chore(ci): remove stale steel entries from .ghaignore

All 14 steel project paths referenced directories that no longer exist
(the steel framework was removed; there is no steel workflow). Removing
the dead ignore entries.

https://claude.ai/code/session_013dpnF6uSGWXjkJJZseqzcP

Author: claude

.github/.ghaignore

@@ -47,27 +47,4 @@ tokens/token-extensions/nft-meta-data-pointer/anchor-example/anchor
 
 tokens/token-extensions/mint-close-authority/native
 tokens/token-extensions/transfer-fee/native
-tokens/token-extensions/non-transferable/native
-
-# all steel projects
-
-basics/account-data/steel
-basics/checking-accounts/steel
-basics/close-account/steel
-basics/counter/steel
-basics/create-account/steel
-basics/cross-program-invocation/steel
-basics/favorites/steel
-basics/pda-rent-payer/steel
-basics/processing-instructions/steel
-basics/program-derived-addresses/steel
-basics/realloc/steel
-basics/rent/steel
-basics/transfer-sol/steel
-
-finance/escrow/steel
-
-tokens/pda-mint-authority/steel
-tokens/token-minter/steel
-finance/token-swap/steel
-tokens/transfer-tokens/steel
+tokens/token-extensions/non-transferable/native