fix: Process dsq messages even when CJ is disabled locally or disk space is low (#5498)

Refusing to process `dsq` will result in node not being able to process
`dstx`es later.

n/a

- [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 _(for repository
code-owners and collaborators only)_

src/coinjoin/client.cpp

@@ -35,14 +35,8 @@ std::unique_ptr<CCoinJoinClientQueueManager> coinJoinClientQueueManager;
 void CCoinJoinClientQueueManager::ProcessMessage(const CNode& peer, std::string_view msg_type, CDataStream& vRecv)
 {
     if (fMasternodeMode) return;
-    if (!CCoinJoinClientOptions::IsEnabled()) return;
     if (!m_mn_sync->IsBlockchainSynced()) return;
 
-    if (!CheckDiskSpace(GetDataDir())) {
-        LogPrint(BCLog::COINJOIN, "CCoinJoinClientQueueManager::ProcessMessage -- Not enough disk space, disabling CoinJoin.\n");
-        return;
-    }
-
     if (msg_type == NetMsgType::DSQUEUE) {
         CCoinJoinClientQueueManager::ProcessDSQueue(peer, vRecv);
     }
@@ -1806,7 +1800,6 @@ void CCoinJoinClientManager::UpdatedBlockTip(const CBlockIndex* pindex)
 
 void CCoinJoinClientQueueManager::DoMaintenance()
 {
-    if (!CCoinJoinClientOptions::IsEnabled()) return;
     if (m_mn_sync == nullptr) return;
     if (fMasternodeMode) return; // no client-side mixing on masternodes