module: Remove the unused function within

The function within is defined in the main.c file, but not called
elsewhere, so remove this unused function.

This routine became no longer used after commit ("module: replace
module_layout with module_memory").

kernel/module/main.c:3007:19: warning: unused function 'within'.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=4035Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
[mcgrof: adjust commit log to explain why this change is needed]
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

kernel/module/main.c

@@ -2975,11 +2975,6 @@ SYSCALL_DEFINE3(finit_module, int, fd, const char __user *, uargs, int, flags)
 	return load_module(&info, uargs, flags);
 }
 
-static inline int within(unsigned long addr, void *start, unsigned long size)
-{
-	return ((void *)addr >= start && (void *)addr < start + size);
-}
-
 /* Keep in sync with MODULE_FLAGS_BUF_SIZE !!! */
 char *module_flags(struct module *mod, char *buf, bool show_state)
 {