Revert "Expand decision logic to evict plus partition"

This reverts commit 7d7c2cc.

Issue is that current logic with this change can lead to situations where the
wrong node is chosen to heal during automatic healing. While it is true that we
should be able to expand the logic it is not as simple because one replica set
will have detected a failed replica, but an entirely differnt replica set will
have to be used to pick a node to heal over.

src/handler.cpp

@@ -463,14 +463,10 @@ namespace dafs
 
         auto minus_address = p_minus->GetNodeSetDetails().zero.replication;
         auto plus_address = p_plus->GetNodeSetDetails().zero.replication;
-        auto zero_plus_address = p_zero->GetNodeSetDetails().plus.replication;
-
-        if ((plus_address.ip == address.ip &&
-             plus_address.port == address.port &&
-             !p_plus->IsAddressResponsive(address)) ||
-            (zero_plus_address.ip == address.ip &&
-             zero_plus_address.port == address.port &&
-             !p_zero->IsAddressResponsive(address)))
+
+        if (plus_address.ip == address.ip &&
+                 plus_address.port == address.port &&
+                 !p_plus->IsAddressResponsive(address))
         {
             // Here we agree with the proposal that plus partition should be
             // removed.