pulse-server: remove unnecessary struct member and includes

Part of !776.

src/modules/module-protocol-pulse/internal.h

@@ -32,11 +32,15 @@
 
 #include <spa/utils/defs.h>
 #include <spa/utils/ringbuffer.h>
-#include <pipewire/pipewire.h>
+#include <pipewire/map.h>
 #include <pipewire/private.h>
 
 #include "format.h"
-#include "volume.h"
+
+struct pw_loop;
+struct pw_context;
+struct pw_work_queue;
+struct pw_properties;
 
 struct defs {
 	struct spa_fraction min_req;
@@ -67,7 +71,6 @@ struct impl {
 
 	struct ratelimit rate_limit;
 
-	struct spa_source *source;
 	struct spa_list servers;
 
 	struct pw_work_queue *work_queue;

src/modules/module-protocol-pulse/pulse-server.c

@@ -26,14 +26,11 @@
 
 #include "config.h"
 
+#include <errno.h>
 #include <string.h>
-#include <unistd.h>
 #include <stdio.h>
-#include <errno.h>
-#include <math.h>
 #include <time.h>
 #include <sys/time.h>
-#include <fcntl.h>
 
 #include <pipewire/log.h>