message: test: Remove leftover comment in mining_basic
diff: @@ -91,7 +91,6 @@ class MiningTest(BitcoinTestFramework):
  coinbase_tx.vin[0].nSequence = 2**32 - 2
  coinbase_tx.rehash()
  - # round-trip the encoded bip34 block height commitment
  block = CBlock()
  block.nVersion = tmpl["version"]
  block.hashPrevBlock = int(tmpl["previousblockhash"], 16)
  