Revert "Add rubocop-rails-omakase (no idea why CI wants it)"

This reverts commit 5ff29fb.

The gem was added experimentally but is not needed. CI passes without it.

Co-authored-by: Ihab Adham <ihabadham@users.noreply.github.com>

Author: github-actions[bot]

react_on_rails/Gemfile.development_dependencies

@@ -37,7 +37,6 @@ group :development, :test do
   gem "steep", require: false
   gem "rubocop", "1.61.0", require: false
   gem "rubocop-performance", "~>1.20.0", require: false
-  gem "rubocop-rails-omakase", "~>1.0.0", require: false
   gem "rubocop-rspec", "~>2.26", require: false
   gem "spring", "~> 4.0"
   gem "lefthook", require: false

react_on_rails/Gemfile.lock

@@ -331,11 +331,6 @@ GEM
       rack (>= 1.1)
       rubocop (>= 1.52.0, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rails-omakase (1.0.0)
-      rubocop
-      rubocop-minitest
-      rubocop-performance
-      rubocop-rails
     rubocop-rspec (2.29.2)
       rubocop (~> 1.40)
       rubocop-capybara (~> 2.17)
@@ -477,7 +472,6 @@ DEPENDENCIES
   rspec_junit_formatter
   rubocop (= 1.61.0)
   rubocop-performance (~> 1.20.0)
-  rubocop-rails-omakase (~> 1.0.0)
   rubocop-rspec (~> 2.26)
   sass-rails (~> 6.0)
   sdoc