rubocop: Move Style/Documentation stanza

- This is better in the `Library/Homebrew/.rubocop.yml` since it's
  operating on files that are within that directory.

Library/.rubocop.yml

@@ -339,48 +339,6 @@ Style/DisableCopsWithinSourceCodeDirective:
     - "/**/{Formula,Casks}/*.rb"
     - "**/{Formula,Casks}/*.rb"
 
-# Only enforce documentation for public APIs.
-Style/Documentation:
-  AllowedConstants:
-    - Homebrew
-  Include:
-    - Homebrew/cask/dsl.rb
-    - Homebrew/cask/dsl/version.rb
-    - Homebrew/cask/url.rb
-    - Homebrew/download_strategy.rb
-    - Homebrew/formula.rb
-    - Homebrew/formula_assertions.rb
-    - Homebrew/formula_free_port.rb
-    - Homebrew/language/go.rb
-    - Homebrew/language/java.rb
-    - Homebrew/language/node.rb
-    - Homebrew/language/perl.rb
-    - Homebrew/language/python.rb
-    - Homebrew/livecheck/strategy/apache.rb
-    - Homebrew/livecheck/strategy/bitbucket.rb
-    - Homebrew/livecheck/strategy/cpan.rb
-    - Homebrew/livecheck/strategy/extract_plist.rb
-    - Homebrew/livecheck/strategy/git.rb
-    - Homebrew/livecheck/strategy/github_latest.rb
-    - Homebrew/livecheck/strategy/gnome.rb
-    - Homebrew/livecheck/strategy/gnu.rb
-    - Homebrew/livecheck/strategy/hackage.rb
-    - Homebrew/livecheck/strategy/json.rb
-    - Homebrew/livecheck/strategy/launchpad.rb
-    - Homebrew/livecheck/strategy/npm.rb
-    - Homebrew/livecheck/strategy/page_match.rb
-    - Homebrew/livecheck/strategy/pypi.rb
-    - Homebrew/livecheck/strategy/sourceforge.rb
-    - Homebrew/livecheck/strategy/sparkle.rb
-    - Homebrew/livecheck/strategy/xorg.rb
-    - Homebrew/os.rb
-    - Homebrew/resource.rb
-    - Homebrew/utils.rb
-    - Homebrew/utils/inreplace.rb
-    - Homebrew/utils/shebang.rb
-    - Homebrew/utils/string_inreplace_extension.rb
-    - Homebrew/version.rb
-
 Style/DocumentationMethod:
   Include:
     - "Homebrew/formula.rb"

Library/Homebrew/.rubocop.yml

@@ -17,6 +17,48 @@ Naming/PredicateName:
     - is_32_bit?
     - is_64_bit?
 
+# Only enforce documentation for public APIs.
+Style/Documentation:
+  AllowedConstants:
+    - Homebrew
+  Include:
+    - cask/dsl.rb
+    - cask/dsl/version.rb
+    - cask/url.rb
+    - download_strategy.rb
+    - formula.rb
+    - formula_assertions.rb
+    - formula_free_port.rb
+    - language/go.rb
+    - language/java.rb
+    - language/node.rb
+    - language/perl.rb
+    - language/python.rb
+    - livecheck/strategy/apache.rb
+    - livecheck/strategy/bitbucket.rb
+    - livecheck/strategy/cpan.rb
+    - livecheck/strategy/extract_plist.rb
+    - livecheck/strategy/git.rb
+    - livecheck/strategy/github_latest.rb
+    - livecheck/strategy/gnome.rb
+    - livecheck/strategy/gnu.rb
+    - livecheck/strategy/hackage.rb
+    - livecheck/strategy/json.rb
+    - livecheck/strategy/launchpad.rb
+    - livecheck/strategy/npm.rb
+    - livecheck/strategy/page_match.rb
+    - livecheck/strategy/pypi.rb
+    - livecheck/strategy/sourceforge.rb
+    - livecheck/strategy/sparkle.rb
+    - livecheck/strategy/xorg.rb
+    - os.rb
+    - resource.rb
+    - utils.rb
+    - utils/inreplace.rb
+    - utils/shebang.rb
+    - utils/string_inreplace_extension.rb
+    - version.rb
+
 Style/HashAsLastArrayItem:
   Exclude:
     - "test/utils/spdx_spec.rb"