Be sure to drop current_sexp from the hashes

It's not always the first in `hashes`, but `current_sexp` uses the first
of the sorted array, so dropping that one is safe.

Covered by tests here:
https://github.com/codeclimate/codeclimate-duplication/blob/master/spec/cc/engine/analyzers/javascript/main_spec.rb#L41-42

Author: gdiggs

lib/cc/engine/analyzers/violation.rb

@@ -43,7 +43,7 @@ def sorted_hashes
         end
 
         def other_sexps
-          @other_locations ||= hashes.drop(1)
+          @other_locations ||= sorted_hashes.drop(1)
         end
 
         def name