Bug 1799620 - mozlint/clippy: using nightly isn't necessary anymore r=linter-reviewers,marco DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D161564

docs/code-quality/lint/linters/clippy.rst

@@ -26,14 +26,8 @@ section in the `clippy.yml <https://searchfox.org/mozilla-central/source/tools/l
 Autofix
 -------
 
-This linter provides a ``--fix`` option. It requires using nightly
-which can be installed with:
-
-.. code-block:: shell
-
-   $ rustup component add clippy --toolchain nightly-x86_64-unknown-linux-gnu
-
-
+This linter provides a ``--fix`` option.
+Please note that this option does not fix all detected issues.
 
 Sources
 -------

tools/lint/clippy/__init__.py

@@ -191,16 +191,13 @@ def lint(paths, config, fix=None, **lintargs):
     cmd_args_common = ["--manifest-path"]
     cmd_args_clippy = [cargo]
 
-    if fix:
-        cmd_args_clippy += ["+nightly"]
-
     cmd_args_clippy += [
         "clippy",
         "--message-format=json",
     ]
 
     if fix:
-        cmd_args_clippy += ["--fix", "-Z", "unstable-options"]
+        cmd_args_clippy += ["--fix"]
 
     lock_files_to_delete = []
     for p in paths: