selftests/memfd: remove unused variable

Commit 544029862cbb ("selftests/memfd: add tests for F_SEAL_FUTURE_WRITE
seal") added an unused variable to mfd_assert_reopen_fd().

Delete the unused variable.

Link: https://lkml.kernel.org/r/[e-mail]
Fixes: 544029862cbb ("selftests/memfd: add tests for F_SEAL_FUTURE_WRITE seal")
Signed-off-by: Greg Thelen <[e-mail]>
Cc: Shuah Khan <[e-mail]>
Cc: Michael Ellerman <[e-mail]>
Cc: "Joel Fernandes (Google)" <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

tools/testing/selftests/memfd/memfd_test.c

···
 
 static int mfd_assert_reopen_fd(int fd_in)
 {
-	int r, fd;
+	int fd;
 	char path[100];
 
 	sprintf(path, "/proc/self/fd/%d", fd_in);