Disable Lint/Void as it triggers incorrectly

* The return value of #initialize and #[]= can be observed by user programs.

Author: eregon

.rubocop.yml

@@ -329,7 +329,7 @@ Lint/UselessSetterCall:
 
 Lint/Void:
   Description: Possible use of operator/literal/variable in void context.
-  Enabled: true
+  Enabled: false # Triggers for any return value for #initialize and #[]=
 
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