Remove 'locale' parameter from all callbacks

The locale parameter was a mistake, because it puts extra needless
burden upon the module developer to have to handle this variable for
each and every single callback function.  The parameter is being removed
in favor of a single centralized module callback function that
specifically updates locale information for a module only when needed.

plugins/obs-x264/obs-x264.c

@@ -38,10 +38,9 @@ struct obs_x264 {
 
 /* ------------------------------------------------------------------------- */
 
-static const char *obs_x264_getname(const char *locale)
+static const char *obs_x264_getname(void)
 {
 	/* TODO locale lookup */
-	UNUSED_PARAMETER(locale);
 	return "x264";
 }
 
@@ -93,7 +92,7 @@ static inline void add_strings(obs_property_t list, const char *const *strings)
 	}
 }
 
-static obs_properties_t obs_x264_props(const char *locale)
+static obs_properties_t obs_x264_props(void)
 {
 	/* TODO: locale */