contrib: fix read metadata related comment

The utxo snapshot metadata doesn't seem to contain any block height as per the
CPP code and no such value is read few lines down by the tool code as well.

Related CPP code: bitcoin/bitcoin/blob/28.x/src/node/utxo_snapshot.h#L60-L66

Author: rkrux

contrib/utxo-tools/utxo_to_sqlite.py

@@ -126,7 +126,7 @@ def main():
     con = sqlite3.connect(args.outfile)
     con.execute("CREATE TABLE utxos(txid TEXT, vout INT, value INT, coinbase INT, height INT, scriptpubkey TEXT)")
 
-    # read metadata (magic bytes, version, network magic, block height, block hash, UTXO count)
+    # read metadata (magic bytes, version, network magic, block hash, UTXO count)
     f = open(args.infile, 'rb')
     magic_bytes = f.read(5)
     version = int.from_bytes(f.read(2), 'little')