Don't count output buffering for queue hold

This would count the output duration for every file buffered, rather
than only once.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>

Audio/Chain/BufferChain.m

@@ -243,9 +243,6 @@
 
 - (double)secondsBuffered {
 	double duration = 0.0;
-	OutputNode *outputNode = (OutputNode *)[controller output];
-	duration += [outputNode secondsBuffered];
-
 	Node *node = [self finalNode];
 	while(node) {
 		duration += [node secondsBuffered];