Disable explicit return types in front_end/component_docs

It leads to very verbose examples, to little gain. So let's let the
developer decide in the docs if they would like explicit returns or not.

Bug: none
Change-Id: I5756fbf738a47e699ee1cf47f04efd7adba4cd01
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2696656
Commit-Queue: Jack Franklin <jacktfranklin@chromium.org>
Auto-Submit: Jack Franklin <jacktfranklin@chromium.org>
Reviewed-by: Tim van der Lippe <tvanderlippe@chromium.org>
diff --git a/PRESUBMIT.py b/PRESUBMIT.py
index 2e23d9e..8f75669 100644
--- a/PRESUBMIT.py
+++ b/PRESUBMIT.py
@@ -214,6 +214,8 @@
 
     front_end_directory = input_api.os_path.join(
         input_api.PresubmitLocalPath(), 'front_end')
+    component_docs_directory = input_api.os_path.join(front_end_directory,
+                                                      'component_docs')
     inspector_overlay_directory = input_api.os_path.join(
         input_api.PresubmitLocalPath(), 'inspector_overlay')
     test_directory = input_api.os_path.join(input_api.PresubmitLocalPath(),
@@ -235,6 +237,7 @@
         input_api.os_path.join(input_api.PresubmitLocalPath(),
                                '.eslintignore'),
         input_api.os_path.join(front_end_directory, '.eslintrc.js'),
+        input_api.os_path.join(component_docs_directory, '.eslintrc.js'),
         input_api.os_path.join(test_directory, '.eslintrc.js'),
         input_api.os_path.join(scripts_directory, 'test',
                                'run_lint_check_js.py'),