use #pragma once instead of foo*foo define guards

src/shared/audit.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef fooaudithfoo
-#define fooaudithfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -28,5 +27,3 @@
 
 int audit_session_from_pid(pid_t pid, uint32_t *id);
 int audit_loginuid_from_pid(pid_t pid, uid_t *uid);
-
-#endif

src/shared/capability.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foocapabilityhfoo
-#define foocapabilityhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -29,5 +28,3 @@ unsigned long cap_last_cap(void);
 int have_effective_cap(int value);
 int capability_bounding_set_drop(uint64_t drop, bool right_now);
 int capability_bounding_set_drop_usermode(uint64_t drop);
-
-#endif

src/shared/cgroup-show.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foocgroupshowhfoo
-#define foocgroupshowhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -32,5 +31,3 @@ int show_cgroup(const char *controller, const char *path, const char *prefix, un
 
 int show_cgroup_and_extra_by_spec(const char *spec, const char *prefix, unsigned n_columns, bool kernel_threads, const pid_t extra_pids[], unsigned n_extra_pids, OutputFlags flags);
 int show_cgroup_and_extra(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, const pid_t extra_pids[], unsigned n_extra_pids, OutputFlags flags);
-
-#endif

src/shared/conf-files.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef fooconffileshfoo
-#define fooconffileshfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -28,5 +27,3 @@
 int conf_files_list(char ***strv, const char *suffix, const char *root, const char *dir, ...);
 int conf_files_list_strv(char ***strv, const char *suffix, const char *root, const char* const* dirs);
 int conf_files_list_nulstr(char ***strv, const char *suffix, const char *root, const char *dirs);
-
-#endif

src/shared/hwclock.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foohwclockhfoo
-#define foohwclockhfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -27,5 +26,3 @@ int hwclock_set_timezone(int *min);
 int hwclock_reset_timezone(void);
 int hwclock_get_time(struct tm *tm);
 int hwclock_set_time(const struct tm *tm);
-
-#endif

src/shared/spawn-polkit-agent.h

@@ -1,7 +1,6 @@
 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
 
-#ifndef foospawnpolkitagenthfoo
-#define foospawnpolkitagenthfoo
+#pragma once
 
 /***
   This file is part of systemd.
@@ -24,5 +23,3 @@
 
 int polkit_agent_open(void);
 void polkit_agent_close(void);
-
-#endif