Merge pull request #10650 from pchote/remove-fragile-diplomacy

Remove fragile diplomacy.

OpenRA.Game/Network/Session.cs

@@ -179,7 +179,6 @@ namespace OpenRA.Network
 			public int Timestep = 40;
 			public int OrderLatency = 3; // net tick frames (x 120 = ms)
 			public int RandomSeed = 0;
-			public bool FragileAlliances = false; // Allow diplomatic stance changes after game start.
 			public bool AllowCheats = false;
 			public bool AllowSpectators = true;
 			public bool Dedicated;