kselftest/arm64: Remove unused parameters in abi test

Remove unused parameter i in tpidr2.c main function.
Signed-off-by: xieming <xieming@kylinos.cn>
Link: https://lore.kernel.org/r/20240422015730.89805-1-xieming@kylinos.cnSigned-off-by: Will Deacon <will@kernel.org>

tools/testing/selftests/arm64/abi/tpidr2.c

@@ -262,7 +262,7 @@ static int write_clone_read(void)
 
 int main(int argc, char **argv)
 {
-	int ret, i;
+	int ret;
 
 	putstr("TAP version 13\n");
 	putstr("1..");