Remove Ruby GC config from spec helper (#25455)

spec/spec_helper.rb

@@ -1,7 +1,5 @@
 # frozen_string_literal: true
 
-GC.disable
-
 if ENV['DISABLE_SIMPLECOV'] != 'true'
   require 'simplecov'
   SimpleCov.start 'rails' do
@@ -13,8 +11,6 @@ if ENV['DISABLE_SIMPLECOV'] != 'true'
   end
 end
 
-gc_counter = -1
-
 RSpec.configure do |config|
   config.example_status_persistence_file_path = 'tmp/rspec/examples.txt'
   config.expect_with :rspec do |expectations|
@@ -37,21 +33,8 @@ RSpec.configure do |config|
   end
 
   config.after :suite do
-    gc_counter = 0
     FileUtils.rm_rf(Dir[Rails.root.join('spec', 'test_files')])
   end
-
-  config.after :each do
-    gc_counter += 1
-
-    if gc_counter > 19
-      GC.enable
-      GC.start
-      GC.disable
-
-      gc_counter = 0
-    end
-  end
 end
 
 def body_as_json