Remove constantinople fork from mainnet config

Author: carver

eth/chains/mainnet/__init__.py

@@ -13,7 +13,6 @@
 from .constants import (
     MAINNET_CHAIN_ID,
     BYZANTIUM_MAINNET_BLOCK,
-    CONSTANTINOPLE_MAINNET_BLOCK,
     TANGERINE_WHISTLE_MAINNET_BLOCK,
     HOMESTEAD_MAINNET_BLOCK,
     SPURIOUS_DRAGON_MAINNET_BLOCK,
@@ -29,7 +28,6 @@
 from eth.vm.base import BaseVM  # noqa: F401
 from eth.vm.forks import (
     ByzantiumVM,
-    ConstantinopleVM,
     FrontierVM,
     HomesteadVM,
     SpuriousDragonVM,
@@ -80,15 +78,13 @@ class MainnetHomesteadVM(MainnetDAOValidatorVM):
     TANGERINE_WHISTLE_MAINNET_BLOCK,
     SPURIOUS_DRAGON_MAINNET_BLOCK,
     BYZANTIUM_MAINNET_BLOCK,
-    CONSTANTINOPLE_MAINNET_BLOCK,
 )
 MAINNET_VMS = (
     FrontierVM,
     MainnetHomesteadVM,
     TangerineWhistleVM,
     SpuriousDragonVM,
     ByzantiumVM,
-    ConstantinopleVM,
 )
 
 MAINNET_VM_CONFIGURATION = tuple(zip(MAINNET_FORK_BLOCKS, MAINNET_VMS))