In the past, NO_LOCALIZE_EXPORT macro must be used to
skip uneeded parsing of src files which has no localizable content.
It is unsued by now and it is more effective to handle
this files on gmake level:
gb_SrsTarget_add_nonlocalizable_files
gb_SrsTarget_add_nonlocalizable_templates

Plus remove some empty src file.

Change-Id: I8fc9b2db0b5fd7a3379d3c5be970c4fc691f4c53