Revert "Really gross fix for input name snake_ vs caMel"

This reverts commit af0c678.

Author: eapache

lib/graphql/schema/input_object.rb

@@ -181,8 +181,7 @@ def validate_non_null_input(input, ctx)
 
           # Inject missing required arguments
           missing_required_inputs = self.arguments.reduce({}) do |m, (argument_name, argument)|
-            ruby_arg_name = argument_name.split(/(?=[A-Z])/).map(&:downcase).join('_').to_sym
-            if !(input.key?(argument_name) || input.key?(ruby_arg_name)) && argument.type.non_null? && warden.get_argument(self, argument_name)
+            if !input.key?(argument_name) && argument.type.non_null? && warden.get_argument(self, argument_name)
               m[argument_name] = nil
             end
 
@@ -192,7 +191,6 @@ def validate_non_null_input(input, ctx)
 
           [input, missing_required_inputs].each do |args_to_validate|
             args_to_validate.each do |argument_name, value|
-              argument_name = argument_name.to_s.split('_').map.with_index { |str, i| i == 0 ? str : str.capitalize }.join if argument_name.is_a?(Symbol)
               argument = warden.get_argument(self, argument_name)
               # Items in the input that are unexpected
               unless argument