[rubygems/rubygems] Remove unnecessary generic

I didn't realize how the `Bundler::GemHelpers.generic` method works when
I added this. It already matches this and other java platforms properly.

https://github.com/rubygems/rubygems/commit/5f0f0c678c

lib/bundler/gem_helpers.rb

@@ -5,7 +5,6 @@ module Bundler
     GENERIC_CACHE = { Gem::Platform::RUBY => Gem::Platform::RUBY } # rubocop:disable Style/MutableConstant
     GENERICS = [
       [Gem::Platform.new("java"), Gem::Platform.new("java")],
-      [Gem::Platform.new("universal-java"), Gem::Platform.new("java")],
       [Gem::Platform.new("mswin32"), Gem::Platform.new("mswin32")],
       [Gem::Platform.new("mswin64"), Gem::Platform.new("mswin64")],
       [Gem::Platform.new("universal-mingw32"), Gem::Platform.new("universal-mingw32")],