Kernel: Remove default arguments from Inode::resolve_as_link()

Nobody was calling it without specifying all arguments anyway.

Kernel/FileSystem/Inode.h

@@ -83,7 +83,7 @@ public:
     virtual KResult chmod(mode_t) = 0;
     virtual KResult chown(uid_t, gid_t) = 0;
     virtual KResult truncate(u64) { return KSuccess; }
-    virtual KResultOr<NonnullRefPtr<Custody>> resolve_as_link(Custody& base, RefPtr<Custody>* out_parent = nullptr, int options = 0, int symlink_recursion_level = 0) const;
+    virtual KResultOr<NonnullRefPtr<Custody>> resolve_as_link(Custody& base, RefPtr<Custody>* out_parent, int options, int symlink_recursion_level) const;
 
     virtual KResultOr<int> get_block_address(int) { return -ENOTSUP; }