No need to ignore anything under bin/ or lib/ anymore

* There are only sources in these directories now.

Author: eregon

.gitignore

@@ -84,41 +84,6 @@ test/mri/tests/cext-c/**/*.o
 /bench-results.json
 /bench-results-processed.json
 
-# Gem dirs
-lib/ruby/gems/2.4.0/*
-!lib/ruby/gems/2.4.0/gems
-lib/ruby/gems/2.4.0/gems/*
-!lib/ruby/gems/2.4.0/gems/did_you_mean-1.1.0
-!lib/ruby/gems/2.4.0/gems/minitest-5.10.1
-!lib/ruby/gems/2.4.0/gems/net-telnet-0.1.1
-!lib/ruby/gems/2.4.0/gems/power_assert-0.4.1
-!lib/ruby/gems/2.4.0/gems/rake-12.0.0
-!lib/ruby/gems/2.4.0/gems/test-unit-3.2.3
-!lib/ruby/gems/2.4.0/gems/xmlrpc-0.2.1
-
-!lib/ruby/gems/2.4.0/specifications
-!lib/ruby/gems/2.4.0/specifications/truffleruby_gem_dir_marker.txt
-lib/ruby/gems/2.4.0/specifications/*
-!lib/ruby/gems/2.4.0/specifications/default
-!lib/ruby/gems/2.4.0/specifications/did_you_mean-1.1.0.gemspec
-!lib/ruby/gems/2.4.0/specifications/minitest-5.10.1.gemspec
-!lib/ruby/gems/2.4.0/specifications/net-telnet-0.1.1.gemspec
-!lib/ruby/gems/2.4.0/specifications/power_assert-0.4.1.gemspec
-!lib/ruby/gems/2.4.0/specifications/rake-12.0.0.gemspec
-!lib/ruby/gems/2.4.0/specifications/test-unit-3.2.3.gemspec
-!lib/ruby/gems/2.4.0/specifications/xmlrpc-0.2.1.gemspec
-
-# Bin directory
-bin/*
-!bin/gem
-!bin/irb
-!bin/rake
-!bin/rdoc
-!bin/ri
-!bin/ruby
-!bin/testrb
-!bin/truffleruby
-
 # Diagnostic output directory
 dumps/