Remove Gitlab::GitAccess#authed_via_jwt?

Previously overridden in EE but no longer required.

lib/gitlab/git_access.rb

@@ -241,8 +241,6 @@ module Gitlab
         end
       elsif user
         # User access is verified in check_change_access!
-      elsif authed_via_jwt?
-        # Authenticated via JWT
       else
         raise UnauthorizedError, ERROR_MESSAGES[:upload]
       end
@@ -331,10 +329,6 @@ module Gitlab
       !Gitlab.config.gitlab_shell.receive_pack
     end
 
-    def authed_via_jwt?
-      false
-    end
-
     protected
 
     def changes_list