x86/module: remove unused code in __apply_relocate_add

This "#if 0" block has been untouched for many years. Remove it to clean
up the code.

Suggested-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Song Liu <song@kernel.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Reviewed-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20230125185401.279042-1-song@kernel.org

arch/x86/kernel/module.c

@@ -187,10 +187,6 @@ static int __apply_relocate_add(Elf64_Shdr *sechdrs,
 				goto invalid_relocation;
 			val -= (u64)loc;
 			write(loc, &val, 4);
-#if 0
-			if ((s64)val != *(s32 *)loc)
-				goto overflow;
-#endif
 			break;
 		case R_X86_64_PC64:
 			if (*(u64 *)loc != 0)