bpf: Remove redundant assignment of variable id

The variable id is being assigned a value that is never read, the
assignment is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Song Liu <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]

Author: Colin Ian King

kernel/bpf/btf.c

@@ -789,7 +789,6 @@ static const struct btf_type *btf_type_skip_qualifiers(const struct btf *btf,
 
 	while (btf_type_is_modifier(t) &&
 	       BTF_INFO_KIND(t->info) != BTF_KIND_TYPEDEF) {
-		id = t->type;
 		t = btf_type_by_id(btf, t->type);
 	}