Remove unused argument

.rubocop.yml

   Exclude:
     - 'app/controllers/api_controller.rb'
 
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
-Lint/UnusedBlockArgument:
-  Exclude:
-    - 'db/seeds.rb'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: AllowUnusedKeywordArguments, IgnoreEmptyMethods.
-Lint/UnusedMethodArgument:
-  Exclude:
-    - 'app/helpers/application_helper.rb'
-
 # Offense count: 30
 Metrics/AbcSize:
   Max: 71

app/helpers/application_helper.rb

 module ApplicationHelper
-  def flash_message(category, message, **pairs)
+  def flash_message(category, message)
     flash[:alerts] ||= {}
     flash[:alerts][category] ||= []
     flash[:alerts][category] << message