shared: Clean up includes

Split out of #37344.

src/shared/loop-util.c

@@ -4,9 +4,7 @@
 #include <valgrind/memcheck.h>
 #endif
 
-#include <errno.h>
 #include <fcntl.h>
-#include <linux/blkpg.h>
 #include <linux/loop.h>
 #include <sys/file.h>
 #include <sys/ioctl.h>
@@ -26,13 +24,13 @@
 #include "fileio.h"
 #include "fs-util.h"
 #include "loop-util.h"
-#include "missing_fs.h"
 #include "parse-util.h"
 #include "path-util.h"
 #include "random-util.h"
 #include "stat-util.h"
 #include "stdio-util.h"
 #include "string-util.h"
+#include "time-util.h"
 
 static void cleanup_clear_loop_close(int *fd) {
         if (*fd < 0)