tests.h: Get rid of TEST_REQ_RUNNING_SYSTEMD()

This only has a single user, let's just inline it and get rid of
the macro.

src/shared/tests.h

@@ -91,13 +91,6 @@ bool can_memlock(void);
         size_t name##_len = 0;                                          \
         assert_se(unhexmem_full(hex, strlen_ptr(hex), false, &name, &name##_len) >= 0);
 
-#define TEST_REQ_RUNNING_SYSTEMD(x)                                 \
-        if (sd_booted() > 0) {                                      \
-                x;                                                  \
-        } else {                                                    \
-                printf("systemd not booted, skipping '%s'\n", #x);   \
-        }
-
 /* Provide a convenient way to check if we're running in CI. */
 const char* ci_environment(void);
 

src/test/test-process-util.c

@@ -113,7 +113,8 @@ TEST(pid_get_comm) {
                 (void) parse_pid(saved_argv[1], &pid);
                 test_pid_get_comm_one(pid);
         } else {
-                TEST_REQ_RUNNING_SYSTEMD(test_pid_get_comm_one(1));
+                if (sd_booted() > 0)
+                        test_pid_get_comm_one(1);
                 test_pid_get_comm_one(getpid());
         }
 }