[PATCH v2] gc: remove unused launchctl_get_uid() call

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

When the launchctl_boot_plist() function was added in
a16eb6b1ff3 (maintenance: skip bootout/bootstrap when plist is
registered, 2021-08-24), an unused call to launchctl_get_uid() was
added along with it. That call appears to have been copy/pasted from
launchctl_boot_plist().

Since we can remove that, we can also get rid of the "result"
variable, whose only purpose was allow for the free() between its
assignment and the return. That pattern also appears to have been
copy/pasted from launchctl_boot_plist().

As the patch shows the returned value from launchctl_get_uid() wasn't
used at all in this function. The launchctl_get_uid() function itself
just calls xstrfmt() and getuid(), neither of which have any subtle
global side-effects, so this removal is safe.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---

Addresses a comment about the clarity of the commit message in v1:
https://lore.kernel.org/git/87bl52dkv1.fsf@evledraar.gmail.com/

Range-diff against v1:
1:  93adb856b0c ! 1:  794e68e7722 gc: remove unused launchctl_get_uid() call
    @@ Commit message
         assignment and the return. That pattern also appears to have been
         copy/pasted from launchctl_boot_plist().
     
    +    As the patch shows the returned value from launchctl_get_uid() wasn't
    +    used at all in this function. The launchctl_get_uid() function itself
    +    just calls xstrfmt() and getuid(), neither of which have any subtle
    +    global side-effects, so this removal is safe.
    +
         Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
     
      ## builtin/gc.c ##

 builtin/gc.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/builtin/gc.c b/builtin/gc.c
index 43c36024cbe..db76af4f31c 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -1602,9 +1602,7 @@ static int launchctl_remove_plists(const char *cmd)
 
 static int launchctl_list_contains_plist(const char *name, const char *cmd)
 {
-	int result;
 	struct child_process child = CHILD_PROCESS_INIT;
-	char *uid = launchctl_get_uid();
 
 	strvec_split(&child.args, cmd);
 	strvec_pushl(&child.args, "list", name, NULL);
@@ -1615,12 +1613,8 @@ static int launchctl_list_contains_plist(const char *name, const char *cmd)
 	if (start_command(&child))
 		die(_("failed to start launchctl"));
 
-	result = finish_command(&child);
-
-	free(uid);
-
 	/* Returns failure if 'name' doesn't exist. */
-	return !result;
+	return !finish_command(&child);
 }
 
 static int launchctl_schedule_plist(const char *exec_path, enum schedule_priority schedule, const char *cmd)
-- 
2.33.0.998.ga4d44345d43