Remove string access core extension dependency

activesupport/lib/active_support/inflector/inflections.rb

-# require "active_support/core_ext/string/access"
-
 module ActiveSupport
   module Inflector
     # A singleton instance of this class is yielded by Inflector.inflections, which can then be used to specify additional
@@ -210,4 +208,4 @@ def classify(table_name)
       camelize(singularize(table_name.to_s.sub(/.*\./, '')))
     end
   end
-end
\ No newline at end of file
+end