Enable rubocop-rails and enable new rubocop-performance cops

.rubocop-performance.yml

@@ -38,3 +38,18 @@ Performance/BindCall:
 
 Performance/BigDecimalWithNumericArgument:
   Enabled: true
+
+Performance/BlockGivenWithExplicitBlock:
+  Enabled: true
+
+Performance/CollectionLiteralInLoop:
+  Enabled: true
+
+Performance/ConstantRegexp:
+  Enabled: true
+
+Performance/MethodObjectAsBlock:
+  Enabled: true
+
+Performance/Sum:
+  Enabled: true

.rubocop.yml

@@ -4,6 +4,5 @@ require:
   - rubocop-rspec
 
 inherit_from:
-  - new_cops.yml
   - default.yml
 

default.yml

@@ -1,4 +1,7 @@
-inherit_from: .rubocop-performance.yml
+inherit_from:
+  - .rubocop-performance.yml
+  - .rubocop-rails.yml
+  - new_cops.yml
 
 AllCops:
   TargetRubyVersion: 2.6

new_cops.yml

@@ -14,33 +14,6 @@ Style/RedundantSelfAssignment: # (new in 0.90)
   Enabled: false
 Style/SoleNestedConditional: # (new in 0.89)
   Enabled: false
-Rails/ActiveRecordCallbacksOrder: # (new in 2.7)
-  Enabled: false
-Rails/FindById: # (new in 2.7)
-  Enabled: false
-Rails/Inquiry: # (new in 2.7)
-  Enabled: false
-Rails/MailerName: # (new in 2.7)
-  Enabled: false
-Rails/MatchRoute: # (new in 2.7)
-  Enabled: false
-Rails/NegateInclude: # (new in 2.7)
-  Enabled: false
-Rails/Pluck: # (new in 2.7)
-  Enabled: false
-Rails/PluckId: # (new in 2.7)
-  Enabled: false
-Rails/PluckInWhere: # (new in 2.7)
-  Enabled: false
-Rails/RenderInline: # (new in 2.7)
-  Enabled: false
-Rails/RenderPlainText: # (new in 2.7)
-  Enabled: false
-Rails/ShortI18n: # (new in 2.7)
-  Enabled: false
-Rails/WhereExists: # (new in 2.7)
-  Enabled: false
-
 
 Layout/BeginEndAlignment: # (new in 0.91)
   Enabled: false
@@ -51,15 +24,13 @@ Lint/IdentityComparison: # (new in 0.91)
 Lint/UselessTimes: # (new in 0.91)
   Enabled: false
 
-
 Lint/HashCompareByIdentity: # (new in 0.93)
   Enabled: false
 Lint/RedundantSafeNavigation: # (new in 0.93)
   Enabled: false
 Style/ClassEqualityComparison: # (new in 0.93)
   Enabled: false
 
-
 Lint/DuplicateRegexpCharacterClassElement: # (new in 1.1)
   Enabled: false
 Lint/EmptyBlock: # (new in 1.1)
@@ -75,7 +46,6 @@ Style/DocumentDynamicEvalDefinition: # (new in 1.1)
 Style/SwapValues: # (new in 1.1)
   Enabled: false
 
-
 Layout/SpaceBeforeBrackets: # (new in 1.7)
   Enabled: false
 Lint/AmbiguousAssignment: # (new in 1.7)
@@ -127,14 +97,3 @@ Rails/WhereEquals: # (new in 2.9)
   Enabled: false
 Rails/WhereNot: # (new in 2.8)
   Enabled: false
-
-Performance/BlockGivenWithExplicitBlock: # (new in 1.9)
-  Enabled: false
-Performance/CollectionLiteralInLoop: # (new in 1.8)
-  Enabled: false
-Performance/ConstantRegexp: # (new in 1.9)
-  Enabled: false
-Performance/MethodObjectAsBlock: # (new in 1.9)
-  Enabled: false
-Performance/Sum: # (new in 1.8)
-  Enabled: false