Rubocop: Disable Style/MethodMissingSuper

Here are the relevant items from the changelog
(https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md):

1. In 0.89.0, "Style/MethodMissingSuper cop is removed in favor of new
Lint/MissingSuper cop."
2. rubocop/rubocop#9072 excludes
`method_missing` from the the Lint/MissingSuper cop.

The reason for (2) was that the "offenses" identified by the cop in
`method_missing` definitions were dominated by false positives.

rubocop.yml

@@ -782,9 +782,6 @@ Style/MethodCallWithoutArgsParentheses:
 Style/MethodDefParentheses:
   Enabled: true
 
-Style/MethodMissingSuper:
-  Enabled: true
-
 Style/MinMax:
   Enabled: true