message: [Spork] Remove unused SPORK_11 and SPORK_12
diff: #define SPORK_8_MASTERNODE_PAYMENT_ENFORCEMENT 10007
  #define SPORK_9_MASTERNODE_BUDGET_ENFORCEMENT 10008
  #define SPORK_10_MASTERNODE_PAY_UPDATED_NODES 10009
  -//#define SPORK_11_LOCK_INVALID_UTXO 10010
  -//#define SPORK_12_RECONSIDER_BLOCKS 10011
  #define SPORK_13_ENABLE_SUPERBLOCKS 10012
  #define SPORK_14_NEW_PROTOCOL_ENFORCEMENT 10013
  #define SPORK_15_NEW_PROTOCOL_ENFORCEMENT_2 10014
  #define SPORK_8_MASTERNODE_PAYMENT_ENFORCEMENT_DEFAULT 4070908800 //OFF
  #define SPORK_9_MASTERNODE_BUDGET_ENFORCEMENT_DEFAULT 4070908800 //OFF
  #define SPORK_10_MASTERNODE_PAY_UPDATED_NODES_DEFAULT 4070908800 //OFF
  -//#define SPORK_11_LOCK_INVALID_UTXO_DEFAULT 4070908800 //OFF - NOTE: this is block height not time!
  #define SPORK_13_ENABLE_SUPERBLOCKS_DEFAULT 4070908800 //OFF
  #define SPORK_14_NEW_PROTOCOL_ENFORCEMENT_DEFAULT 4070908800 //OFF
  #define SPORK_15_NEW_PROTOCOL_ENFORCEMENT_2_DEFAULT 4070908800 //OFF
  