chore: delete commented code

We decided that since the signerdb is in the filesystem, we do not need
to garbage collect it.

stacks-signer/src/signer.rs

@@ -1029,13 +1029,6 @@ impl Signer {
             return;
         };
 
-        // WIP: try not deleting a block from signerDB until we have a better garbage collection strategy.
-        // This causes issues when we have to reprocess a block and we have already deleted it from the signerDB
-        // // TODO: proper garbage collection...This is currently our only cleanup of blocks
-        // self.signer_db
-        //     .remove_block(&block_vote.signer_signature_hash)
-        //     .expect(&format!("{self}: Failed to remove block from to signer DB"));
-
         let block_submission = if block_vote.rejected {
             // We signed a rejection message. Return a rejection message
             BlockResponse::rejected(block_vote.signer_signature_hash, signature.clone())