diff --git a/src/lint/engine/ArcanistLintEngine.php b/src/lint/engine/ArcanistLintEngine.php
--- a/src/lint/engine/ArcanistLintEngine.php
+++ b/src/lint/engine/ArcanistLintEngine.php
@@ -144,8 +144,8 @@
         $this->fileData[$path] = $this->getHookAPI()
           ->getCurrentFileData($path);
       } else {
-        $disk_path = $this->getFilePathOnDisk($path);
-        $this->fileData[$path] = Filesystem::readFile($disk_path);
+      $disk_path = $this->getFilePathOnDisk($path);
+      $this->fileData[$path] = Filesystem::readFile($disk_path);
       }
     }
     return $this->fileData[$path];
diff --git a/src/lint/linter/ArcanistClosureLinter.php b/src/lint/linter/ArcanistClosureLinter.php
--- a/src/lint/linter/ArcanistClosureLinter.php
+++ b/src/lint/linter/ArcanistClosureLinter.php
@@ -37,10 +37,6 @@
       'files/closure_linter-latest.tar.gz');
   }
 
-  public function supportsReadDataFromStdin() {
-    return false;
-  }
-
   protected function parseLinterOutput($path, $err, $stdout, $stderr) {
     $lines = phutil_split_lines($stdout, false);
     $messages = array();
diff --git a/src/lint/linter/ArcanistCoffeeLintLinter.php b/src/lint/linter/ArcanistCoffeeLintLinter.php
--- a/src/lint/linter/ArcanistCoffeeLintLinter.php
+++ b/src/lint/linter/ArcanistCoffeeLintLinter.php
@@ -47,14 +47,6 @@
       'npm install -g coffeelint');
   }
 
-  public function supportsReadDataFromStdin() {
-    return true;
-  }
-
-  public function getReadDataFromStdinFilename() {
-    return '--stdin';
-  }
-
   protected function getMandatoryFlags() {
     $options = array(
       '--reporter=raw',
diff --git a/src/lint/linter/ArcanistCpplintLinter.php b/src/lint/linter/ArcanistCpplintLinter.php
--- a/src/lint/linter/ArcanistCpplintLinter.php
+++ b/src/lint/linter/ArcanistCpplintLinter.php
@@ -29,14 +29,6 @@
       'googlecode.com/svn/trunk/cpplint/cpplint.py`.');
   }
 
-  public function supportsReadDataFromStdin() {
-    return true;
-  }
-
-  public function getReadDataFromStdinFilename() {
-    return '-';
-  }
-
   protected function getDefaultFlags() {
     return $this->getDeprecatedConfiguration('lint.cpplint.options', array());
   }
diff --git a/src/lint/linter/ArcanistExternalLinter.php b/src/lint/linter/ArcanistExternalLinter.php
--- a/src/lint/linter/ArcanistExternalLinter.php
+++ b/src/lint/linter/ArcanistExternalLinter.php
@@ -60,50 +60,6 @@
   }
 
   /**
-   * Return true to indicate that the external linter can read input from
-   * stdin, rather than requiring a file. If this mode is supported, it is
-   * slightly more flexible and may perform better, and is thus preferable.
-   *
-   * To send data over stdin instead of via a command line parameter, override
-   * this method and return true. If the linter also needs a command line
-   * flag (like `--stdin` or `-`), override
-   * @{method:getReadDataFromStdinFilename} to provide it.
-   *
-   * For example, linters are normally invoked something like this:
-   *
-   *   $ linter file.js
-   *
-   * If you override this method, invocation will be more similar to this:
-   *
-   *   $ linter < file.js
-   *
-   * If you additionally override @{method:getReadDataFromStdinFilename} to
-   * return `"-"`, invocation will be similar to this:
-   *
-   *   $ linter - < file.js
-   *
-   * @return bool True to send data over stdin.
-   * @task bin
-   */
-  public function supportsReadDataFromStdin() {
-    return false;
-  }
-
-  /**
-   * If the linter can read data over stdin, override
-   * @{method:supportsReadDataFromStdin} and then optionally override this
-   * method to provide any required arguments (like `-` or `--stdin`). See
-   * that method for discussion.
-   *
-   * @return string|null  Additional arguments required by the linter when
-   *                      operating in stdin mode.
-   * @task bin
-   */
-  public function getReadDataFromStdinFilename() {
-    return null;
-  }
-
-  /**
    * Provide mandatory, non-overridable flags to the linter. Generally these
    * are format flags, like `--format=xml`, which must always be given for
    * the output to be usable.
@@ -373,18 +329,9 @@
 
     $futures = array();
     foreach ($paths as $path) {
-      if ($this->supportsReadDataFromStdin()) {
-        $future = new ExecFuture(
-          '%C %C',
-          $bin,
-          $this->getReadDataFromStdinFilename());
-        $future->write($this->getEngine()->loadData($path));
-      } else {
-        // TODO: In commit hook mode, we need to do more handling here.
-        $disk_path = $this->getEngine()->getFilePathOnDisk($path);
-        $path_argument = $this->getPathArgumentForLinterFuture($disk_path);
-        $future = new ExecFuture('%C %C', $bin, $path_argument);
-      }
+      $disk_path = $this->getEngine()->getFilePathOnDisk($path);
+      $path_argument = $this->getPathArgumentForLinterFuture($disk_path);
+      $future = new ExecFuture('%C %C', $bin, $path_argument);
 
       $future->setCWD($this->getEngine()->getWorkingCopy()->getProjectRoot());
       $futures[$path] = $future;
diff --git a/src/lint/linter/ArcanistHLintLinter.php b/src/lint/linter/ArcanistHLintLinter.php
--- a/src/lint/linter/ArcanistHLintLinter.php
+++ b/src/lint/linter/ArcanistHLintLinter.php
@@ -33,14 +33,6 @@
     return pht('Install hlint with `cabal install hlint`.');
   }
 
-  public function supportsReadDataFromStdin() {
-    return true;
-  }
-
-  public function getReadDataFromStdinFilename() {
-    return '-';
-  }
-
   protected function getMandatoryFlags() {
     return array('--json');
   }
diff --git a/src/lint/linter/ArcanistJSONLintLinter.php b/src/lint/linter/ArcanistJSONLintLinter.php
--- a/src/lint/linter/ArcanistJSONLintLinter.php
+++ b/src/lint/linter/ArcanistJSONLintLinter.php
@@ -47,10 +47,6 @@
     return pht('Install jsonlint using `npm install -g jsonlint`.');
   }
 
-  public function supportsReadDataFromStdin() {
-    return true;
-  }
-
   protected function getMandatoryFlags() {
     return array(
       '--compact',
diff --git a/src/lint/linter/ArcanistLesscLinter.php b/src/lint/linter/ArcanistLesscLinter.php
--- a/src/lint/linter/ArcanistLesscLinter.php
+++ b/src/lint/linter/ArcanistLesscLinter.php
@@ -101,17 +101,6 @@
     return pht('Install lessc using `npm install -g less`.');
   }
 
-  public function supportsReadDataFromStdin() {
-    // Technically `lessc` can read data from standard input however, when doing
-    // so, relative imports cannot be resolved. Therefore, this functionality is
-    // disabled.
-    return false;
-  }
-
-  public function getReadDataFromStdinFilename() {
-    return '-';
-  }
-
   protected function getMandatoryFlags() {
     return array(
       '--lint',
diff --git a/src/lint/linter/ArcanistPhpLinter.php b/src/lint/linter/ArcanistPhpLinter.php
--- a/src/lint/linter/ArcanistPhpLinter.php
+++ b/src/lint/linter/ArcanistPhpLinter.php
@@ -55,10 +55,6 @@
     return $stdout;
   }
 
-  public function supportsReadDataFromStdin() {
-    return false;
-  }
-
   protected function canCustomizeLintSeverities() {
     return false;
   }
diff --git a/src/lint/linter/ArcanistPhpcsLinter.php b/src/lint/linter/ArcanistPhpcsLinter.php
--- a/src/lint/linter/ArcanistPhpcsLinter.php
+++ b/src/lint/linter/ArcanistPhpcsLinter.php
@@ -96,10 +96,6 @@
     }
   }
 
-  public function supportsReadDataFromStdin() {
-    return true;
-  }
-
   protected function parseLinterOutput($path, $err, $stdout, $stderr) {
     // NOTE: Some version of PHPCS after 1.4.6 stopped printing a valid, empty
     // XML document to stdout in the case of no errors. If PHPCS exits with
diff --git a/src/lint/linter/ArcanistPyFlakesLinter.php b/src/lint/linter/ArcanistPyFlakesLinter.php
--- a/src/lint/linter/ArcanistPyFlakesLinter.php
+++ b/src/lint/linter/ArcanistPyFlakesLinter.php
@@ -53,10 +53,6 @@
     return pht('Install pyflakes with `pip install pyflakes`.');
   }
 
-  public function supportsReadDataFromStdin() {
-    return true;
-  }
-
   protected function parseLinterOutput($path, $err, $stdout, $stderr) {
     $lines = phutil_split_lines($stdout, false);
 
diff --git a/src/lint/linter/ArcanistRubyLinter.php b/src/lint/linter/ArcanistRubyLinter.php
--- a/src/lint/linter/ArcanistRubyLinter.php
+++ b/src/lint/linter/ArcanistRubyLinter.php
@@ -50,10 +50,6 @@
     return pht('Install `ruby` from <http://www.ruby-lang.org/>.');
   }
 
-  public function supportsReadDataFromStdin() {
-    return true;
-  }
-
   protected function getMandatoryFlags() {
     // -w: turn on warnings
     // -c: check syntax