lockfile: drop unnecessary headers from lockfile-util.h

src/machine/image-dbus.c

@@ -15,6 +15,7 @@
 #include "io-util.h"
 #include "loop-util.h"
 #include "machine-image.h"
+#include "missing_capability.h"
 #include "mount-util.h"
 #include "process-util.h"
 #include "raw-clone.h"

src/machine/machined-dbus.c

@@ -21,6 +21,7 @@
 #include "machine-image.h"
 #include "machine-pool.h"
 #include "machined.h"
+#include "missing_capability.h"
 #include "path-util.h"
 #include "process-util.h"
 #include "stdio-util.h"