r600g: remove unused variable num_dest_buffers

src/gallium/drivers/r600/evergreen_state.c

@@ -1531,7 +1531,6 @@ static void evergreen_set_framebuffer_state(struct pipe_context *ctx,
 		return;
 
 	r600_flush_framebuffer(rctx, false);
-	rctx->num_dest_buffers = state->nr_cbufs;
 
 	/* unreference old buffer and reference new one */
 	rstate->id = R600_PIPE_STATE_FRAMEBUFFER;
@@ -1546,7 +1545,6 @@ static void evergreen_set_framebuffer_state(struct pipe_context *ctx,
 	}
 	if (state->zsbuf) {
 		evergreen_db(rctx, rstate, state);
-		rctx->num_dest_buffers++;
 	}
 
 	shader_mask = 0;

src/gallium/drivers/r600/r600_pipe.h

@@ -301,7 +301,6 @@ struct r600_context {
 
 	unsigned		backend_mask;
 	unsigned                max_db; /* for OQ */
-	unsigned                num_dest_buffers;
 	unsigned		flags;
 	boolean                 predicate_drawing;
 	struct r600_range	ps_resources;

src/gallium/drivers/r600/r600_state.c

@@ -1614,7 +1614,6 @@ static void r600_set_framebuffer_state(struct pipe_context *ctx,
 		return;
 
 	r600_flush_framebuffer(rctx, false);
-	rctx->num_dest_buffers = state->nr_cbufs;
 
 	/* unreference old buffer and reference new one */
 	rstate->id = R600_PIPE_STATE_FRAMEBUFFER;
@@ -1628,7 +1627,6 @@ static void r600_set_framebuffer_state(struct pipe_context *ctx,
 	}
 	if (state->zsbuf) {
 		r600_db(rctx, rstate, state);
-		rctx->num_dest_buffers++;
 	}
 
 	shader_mask = 0;