cam: capture: remove unused local variable

Remove unused local map variable.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/cam/capture.cpp

@@ -91,7 +91,6 @@ int Capture::capture(EventLoop *loop)
 			return -ENOMEM;
 		}
 
-		std::map<Stream *, Buffer *> map;
 		for (StreamConfiguration &cfg : *config_) {
 			Stream *stream = cfg.stream();
 			std::unique_ptr<Buffer> buffer = stream->createBuffer(i);