Merge #6126: feat: enable EHF activation of MN_RR on mainnet

a8a3ea0 feat: enable EHF activation of MN_RR on mainnet (Konstantin Akimov)

Pull request description:

  ## Issue being fixed or feature implemented
  #6081

  ## What was done?
  Removed a code, that disabled MN_RR activation with EHF on Main Net

  ## How Has This Been Tested?
  This code is tested on devnet, is in process of testing on testnet.

  ## Breaking Changes
  It make MN_RR possible to get active on mainnet.

  ## Checklist:
  - [x] I have performed a self-review of my own code
  - [ ] I have commented my code, particularly in hard-to-understand areas
  - [ ] I have added or updated relevant unit/integration/functional/e2e tests
  - [ ] I have made corresponding changes to the documentation
  - [x] I have assigned this pull request to a milestone

ACKs for top commit:
  UdjinM6:
    utACK a8a3ea0
  PastaPastaPasta:
    utACK a8a3ea0

Tree-SHA512: 0ae7aecca8463436e952154210cf564333cd77dd1149f7ff88ca144f3b7c434e75e473ea3a6850da1b126efd8a9cece34e46b4bf2b37f5937bcf1f5780e18f50

src/llmq/ehf_signals.cpp

@@ -52,10 +52,6 @@ void CEHFSignalsHandler::UpdatedBlockTip(const CBlockIndex* const pindexNew, boo
         return;
     }
 
-    if (Params().NetworkIDString() == CBaseChainParams::MAIN) {
-        // TODO: v20 will never attempt to create EHF messages on main net; if this is needed it will be done by v20.1 or v21 nodes
-        return;
-    }
     const auto ehfSignals = mnhfman.GetSignalsStage(pindexNew);
     for (const auto& deployment : Params().GetConsensus().vDeployments) {
         // Skip deployments that do not use dip0023
@@ -102,10 +98,6 @@ void CEHFSignalsHandler::trySignEHFSignal(int bit, const CBlockIndex* const pind
 
 void CEHFSignalsHandler::HandleNewRecoveredSig(const CRecoveredSig& recoveredSig)
 {
-    if (Params().NetworkIDString() == CBaseChainParams::MAIN) {
-        // TODO: v20 will never attempt to create EHF messages on main net; if this is needed it will be done by v20.1 or v21 nodes
-        return;
-    }
     if (g_txindex) {
         g_txindex->BlockUntilSyncedToCurrentChain();
     }