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selftests: proc: remove unreached code and fix build warning

fix the following warning:
proc-empty-vm.c:385:17: warning: ignoring return value of `write'
declared with attribute `warn_unused_result' [-Wunused-result]
385 | write(1, buf, rv);
| ^~~~~~~~~~~~~~~~~

Link: https://lkml.kernel.org/r/20240603124220.33778-1-amer.shanawany@gmail.com
Signed-off-by: Amer Al Shanawany <amer.shanawany@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/r/202404010211.ygidvMwa-lkp@intel.com/
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Swarup Laxman Kotiaklapudi <swarupkotikalapudi@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

authored by

Amer Al Shanawany and committed by
Andrew Morton 2d87af06 6f3283df

-3
-3
tools/testing/selftests/proc/proc-empty-vm.c
··· 381 381 382 382 assert(rv >= 0); 383 383 assert(rv <= sizeof(buf)); 384 - if (0) { 385 - write(1, buf, rv); 386 - } 387 384 388 385 const char *p = buf; 389 386 const char *const end = p + rv;