Remove libev_scheduler because it's broken on Ruby head and looks unmaintained

Author: rmosolgo

Gemfile

@@ -9,12 +9,10 @@ gem 'pry'
 gem 'pry-stack_explorer', platform: :ruby
 
 if RUBY_VERSION >= "3.0"
-  gem "libev_scheduler"
   gem "evt"
 end
 
 if RUBY_VERSION >= "3.2.0"
-  gem "minitest-mock"
   gem "async", "~>2.0"
   gem "minitest-mock"
 end

gemfiles/mongoid_8.gemfile

@@ -8,7 +8,6 @@ gem "ruby-prof", platform: :ruby
 gem "pry"
 gem "pry-stack_explorer", platform: :ruby
 gem "mongoid", "~> 8.0"
-gem "libev_scheduler"
 gem "evt"
 gem "async"
 gem "concurrent-ruby", "1.3.4"

gemfiles/mongoid_9.gemfile

@@ -7,7 +7,6 @@ gem "ruby-prof", platform: :ruby
 gem "pry"
 gem "pry-stack_explorer", platform: :ruby
 gem "mongoid", "~> 9.0"
-gem "libev_scheduler"
 gem "evt"
 gem "async"
 gem "minitest-mock"

gemfiles/rails_7.2_postgresql.gemfile

@@ -11,7 +11,6 @@ gem "pg", platform: :ruby
 gem "sequel"
 gem "evt"
 gem "async"
-gem "libev_scheduler"
 gem "google-protobuf"
 
 gemspec path: "../"

gemfiles/rails_master.gemfile

@@ -11,9 +11,6 @@ gem 'sqlite3'
 gem 'pg'
 gem "sequel"
 gem "evt"
-if RUBY_ENGINE == "ruby" # This doesn't work on truffle-ruby because there's no `IO::READABLE`
-  gem "libev_scheduler"
-end
 gem "async"
 gem "google-protobuf"
 gem "redis"

spec/graphql/dataloader/nonblocking_dataloader_spec.rb

@@ -245,12 +245,6 @@ def self.included(child_class)
     end
 
     if RUBY_ENGINE == "ruby" && !ENV["GITHUB_ACTIONS"]
-      describe "With libev_scheduler" do
-        require "libev_scheduler"
-        let(:scheduler_class) { Libev::Scheduler }
-        include NonblockingDataloaderAssertions
-      end
-
       describe "with evt" do
         require "evt"
         let(:scheduler_class) { Evt::Scheduler }

spec/graphql/dataloader_spec.rb

@@ -1325,27 +1325,6 @@ def make_schema_from(schema)
 
       include DataloaderAssertions
     end
-
-    if RUBY_ENGINE == "ruby" && !ENV["GITHUB_ACTIONS"]
-      describe "nonblocking: true with libev" do
-        require "libev_scheduler"
-        def make_schema_from(schema)
-          Class.new(schema) do
-            use GraphQL::Dataloader, nonblocking: true
-          end
-        end
-
-        before do
-          Fiber.set_scheduler(Libev::Scheduler.new)
-        end
-
-        after do
-          Fiber.set_scheduler(nil)
-        end
-
-        include DataloaderAssertions
-      end
-    end
   end
 
   describe "example from #3314" do