plparser: Fix TotemPlParserMetadata in bindings
Remove TotemPlParserMetadata as a separate type. It will only be exposes in C, not in bindings.
This fixes gjs warnings such as: (gjs:2781): Gjs-WARNING **: 21:48:14.325: JS ERROR: Error: No introspection information found for TotemPlParserMetadata
Closes: #22 (closed)
Edited by Bastien Nocera