Remove unused entries from Gemfile

Author: yahonda

Gemfile

@@ -13,9 +13,6 @@ group :development do
   gem "rubocop-rails", require: false
   gem "rubocop-rspec", require: false
 
-  #  gem "activerecord",   github: "rails/rails", ref: "3421e892afa532a254e54379ac2ce9bef138cf3f" # introduction of RETURNING code
-  #  gem "activerecord",   github: "rails/rails", ref: "c2c861f98ae25d0daa177898db48f12de1065cf6" # fix for RETURNING code on main (7.2.x)
-  #  gem "activerecord",   github: "rails/rails", ref: "221e609ee8cb1dfb686e43481f3e9496b549e974" # backport of RETURNING code to 7-1-stable
   gem "activerecord",   github: "rails/rails", branch: "7-1-stable"
   gem "ruby-plsql", github: "rsim/ruby-plsql", branch: "master"