Remove temporary monkey patch for Mnemosyne

config/initializers/monkey_patches.rb

@@ -17,22 +17,3 @@ module WillPaginate
     end
   end
 end
-
-# Required until Rails 7.1 is officially supported.
-# See https://github.com/mnemosyne-mon/mnemosyne-ruby/pull/70
-module Mnemosyne
-  class Trace
-    def attach_error(error)
-      case error
-        when ActionDispatch::ExceptionWrapper
-          @errors << Error.new(error.exception)
-        when Exception
-          @errors << Error.new(error)
-        when String
-          @errors << Error.new(RuntimeError.new(error))
-        else
-          raise ArgumentError.new "Invalid error type: #{error.inspect}"
-      end
-    end
-  end
-end