Fix Style/EachWithObject offenses

Fixes Style/EachWithObject offenses

.rubocop_todo.yml

@@ -309,16 +309,6 @@ Style/BarePercentLiterals:
 Style/CaseLikeIf:
   Enabled: false
 
-# Offense count: 5
-# Cop supports --auto-correct.
-Style/EachWithObject:
-  Exclude:
-    - 'lib/expand_variables.rb'
-    - 'lib/gitlab/ci/ansi2html.rb'
-    - 'lib/gitlab/hook_data/issuable_builder.rb'
-    - 'lib/gitlab/i18n/po_linter.rb'
-    - 'lib/gitlab/import_export/members_mapper.rb'
-
 # Offense count: 55
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle.

lib/expand_variables.rb

@@ -50,9 +50,8 @@ module ExpandVariables
 
       # Convert hash array to variables
       if variables.is_a?(Array)
-        variables = variables.reduce({}) do |hash, variable|
+        variables = variables.each_with_object({}) do |variable, hash|
           hash[variable[:key]] = variable[:value]
-          hash
         end
       end
 

lib/gitlab/ci/ansi2html.rb

@@ -447,9 +447,8 @@ module Gitlab
         end
 
         def state
-          state = STATE_PARAMS.inject({}) do |h, param|
+          state = STATE_PARAMS.each_with_object({}) do |param, h|
             h[param] = send(param) # rubocop:disable GitlabSecurity/PublicSend
-            h
           end
           Base64.urlsafe_encode64(state.to_json)
         end

lib/gitlab/hook_data/issuable_builder.rb

@@ -53,10 +53,7 @@ module Gitlab
       end
 
       def final_changes(changes_hash)
-        changes_hash.reduce({}) do |hash, (key, changes_array)|
-          hash[key] = Hash[CHANGES_KEYS.zip(changes_array)]
-          hash
-        end
+        changes_hash.transform_values { |changes_array| Hash[CHANGES_KEYS.zip(changes_array)] }
       end
     end
   end

lib/gitlab/i18n/po_linter.rb

@@ -248,10 +248,9 @@ module Gitlab
             variable == '%d' ? Random.rand(1000) : Gitlab::Utils.random_string
           end
         else
-          variables.inject({}) do |hash, variable|
+          variables.each_with_object({}) do |variable, hash|
             variable_name = variable[/\w+/]
             hash[variable_name] = Gitlab::Utils.random_string
-            hash
           end
         end
       end

lib/gitlab/import_export/members_mapper.rb

@@ -16,7 +16,7 @@ module Gitlab
       def map
         @map ||=
           begin
-            @exported_members.inject(missing_keys_tracking_hash) do |hash, member|
+            @exported_members.each_with_object(missing_keys_tracking_hash) do |member, hash|
               if member['user']
                 old_user_id = member['user']['id']
                 existing_user_id = existing_users_email_map[get_email(member)]
@@ -24,8 +24,6 @@ module Gitlab
               else
                 add_team_member(member)
               end
-
-              hash
             end
           end
       end