chore: remove bitswap from debug log

blockstore can be used in contexts where there is no bitswap,
and this log message will me EXTREMELY confusing, wasting people's
time on debugging invalid side of system

blockservice/blockservice.go

@@ -244,7 +244,7 @@ func getBlock(ctx context.Context, c cid.Cid, bs blockstore.Blockstore, fget fun
 
 		// TODO be careful checking ErrNotFound. If the underlying
 		// implementation changes, this will break.
-		logger.Debug("Blockservice: Searching bitswap")
+		logger.Debug("BlockService: Searching")
 		blk, err := f.GetBlock(ctx, c)
 		if err != nil {
 			return nil, err
@@ -262,7 +262,7 @@ func getBlock(ctx context.Context, c cid.Cid, bs blockstore.Blockstore, fget fun
 		return blk, nil
 	}
 
-	logger.Debug("Blockservice GetBlock: Not found")
+	logger.Debug("BlockService GetBlock: Not found")
 	return nil, err
 }