fix(codec): remove [patch] section that breaks CI

The [patch] with path = "../nbt" fails in CI where sibling dirs
don't exist. Git deps now point to repos with real code.

Author: dodoflix

Cargo.toml

@@ -50,7 +50,3 @@ must_use_candidate         = "allow"
 cast_possible_truncation   = "allow"
 cast_sign_loss             = "allow"
 cast_possible_wrap         = "allow"
-
-# ── Local overrides (meta-repo development) ──────────────────────
-[patch."https://github.com/oxidized-mc/nbt.git"]
-oxidized-nbt = { path = "../nbt" }