Fixes Rubocop Style/ModuleFunction

.rubocop_todo.yml

@@ -117,14 +117,6 @@ Style/MissingRespondToMissing:
   Exclude:
     - 'lib/faraday.rb'
 
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, Autocorrect.
-# SupportedStyles: module_function, extend_self
-Style/ModuleFunction:
-  Exclude:
-    - 'lib/faraday/utils.rb'
-
 # Offense count: 1
 Style/MultipleComparison:
   Exclude:

lib/faraday/utils.rb

@@ -5,7 +5,7 @@ require 'faraday/utils/params_hash'
 
 module Faraday
   module Utils
-    extend self
+    module_function
 
     def build_query(params)
       FlatParamsEncoder.encode(params)
@@ -100,8 +100,6 @@ module Faraday
       deep_merge!(source.dup, hash)
     end
 
-    protected
-
     def sort_query_params(query)
       query.split('&').sort.join('&')
     end