Enable `Style/DefWithParentheses` rubocop rule

The def with blank `()` was newly added in #31176, but we have not used
the blank `()` style in most part of our code base.
So I've enabled `Style/DefWithParentheses` to prevent to newly added the
code.

2 files changed, 2 insertions, 2 deletions

diff --git a/activesupport/lib/active_support/values/time_zone.rb b/activesupport/lib/active_support/values/time_zone.rb
index 07e37f5dd2..4d81ac939e 100644
--- a/activesupport/lib/active_support/values/time_zone.rb
+++ b/activesupport/lib/active_support/values/time_zone.rb
@@ -256,7 +256,7 @@ module ActiveSupport
         @country_zones[code] ||= load_country_zones(code)
       end
 
-      def clear() #:nodoc:
+      def clear #:nodoc:
         @lazy_zones_map = Concurrent::Map.new
         @country_zones  = Concurrent::Map.new
         @zones = nil
diff --git a/activesupport/test/json/encoding_test.rb b/activesupport/test/json/encoding_test.rb
index 96ad8dfbdb..d904f79ccf 100644
--- a/activesupport/test/json/encoding_test.rb
+++ b/activesupport/test/json/encoding_test.rb
@@ -210,7 +210,7 @@ class TestJSONEncoding < ActiveSupport::TestCase
 
   People = Class.new(BasicObject) do
     include Enumerable
-    def initialize()
+    def initialize
       @people = [
         { name: "John", address: { city: "London", country: "UK" } },
         { name: "Jean", address: { city: "Paris" , country: "France" } }