x86/module: Remove unnecessary check in module_finalize()

The "calls" pointer can no longer be NULL after the following
commit:

ab9fea59487d ("x86/alternative: Simplify callthunk patching")

Delete this unnecessary check.

Signed-off-by: Dan Carpenter <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>
Acked-by: Song Liu <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/x86/kernel/module.c

···
 	if (calls) {
 		struct callthunk_sites cs = {};
 
-		if (calls) {
-			cs.call_start = (void *)calls->sh_addr;
-			cs.call_end = (void *)calls->sh_addr + calls->sh_size;
-		}
+		cs.call_start = (void *)calls->sh_addr;
+		cs.call_end = (void *)calls->sh_addr + calls->sh_size;
 
 		callthunks_patch_module_calls(&cs, me);
 	}