Drop unnecessary Rubocop rules b/c cookstyle

.rubocop.yml

@@ -1,32 +1,4 @@
-# Lining up the attributes of some methods is advantageous for readability
-Style/SpaceBeforeFirstArg:
-  Enabled: false
-
-# Chef methods tend to be self-documenting
-Style/Documentation:
-  Enabled: false
-
 # Offense count: 1
 Style/ClassVars:
   Exclude:
     - 'libraries/default.rb'
-
-# The default 79 character limit is sometimes unproductive.
-Metrics/LineLength:
-  Max: 120
-
-# The default 10 lines limit is unrealistic.
-Metrics/MethodLength:
-  Max: 50
-
-Metrics/AbcSize:
-  Enabled: false
-
-Metrics/CyclomaticComplexity:
-  Enabled: false
-
-AllCops:
-  Exclude:
-    - 'Guardfile'
-    - 'Rakefile'
-    - 'vendor/bundle/**/*'