libsaria: Remove old init_src() function

I don't even remember the last time this was used.  Why bother keeping
it around?

libsaria/sources/__init__.py

@@ -48,10 +48,6 @@ def set_attr(attr, value):
 		cur_source.set_attr(cur_id, attr, value)
 		cur_source.save()
 
-def init_src(init_func, callback):
-	thr = threads.BG_Thread(init_func, callback)
-	thr.start()
-
 def new_source(path, bg=True):
 	global library
 	path = expand(path)