DEV: Ruby 2.5.1 is no longer supported with Discourse

This removes a monkey patch we no longer need since our containers require
2.5.2 or up for all Discourse installs.

If you are looking to deploy on 2.5.1 which is highly not recommended you
will need to figure out how to apply this diff.

lib/freedom_patches/net.rb

@@ -1,49 +0,0 @@
-if Gem::Version.new(RUBY_VERSION) == Gem::Version.new("2.5.1")
-  require 'net/pop'
-
-  module Net
-    class POP3
-      def inspect
-        +"#<#{self.class} #{@address}:#{@port} open=#{@started}>"
-      end
-    end
-
-    class POPMail
-      def inspect
-        +"#<#{self.class} #{@number}#{@deleted ? ' deleted' : ''}>"
-      end
-
-      def pop(dest = +'', &block) # :yield: message_chunk
-        if block_given?
-          @command.retr(@number, &block)
-          nil
-        else
-          @command.retr(@number) do |chunk|
-            dest << chunk
-          end
-          dest
-        end
-      end
-
-      def top(lines, dest = +'')
-        @command.top(@number, lines) do |chunk|
-          dest << chunk
-        end
-        dest
-      end
-
-      def header(dest = +'')
-        top(0, dest)
-      end
-    end
-
-    class POP3Command
-      def inspect
-        +"#<#{self.class} socket=#{@socket}>"
-      end
-    end
-  end
-elsif Gem::Version.new(RUBY_VERSION) > Gem::Version.new("2.5.1")
-  # See https://github.com/ruby/ruby/commit/7830a950efa6d312e7c662beabaa0f8d7b4e0a23
-  STDERR.puts 'This monkey patch is no longer required.'
-end