Remove some unnecessary default handlers.

`ConstructionFinished` is obselete since 88dc6d8e1e.
These messages are only sent when the entity is in a specific state (or
states).

Differential revision: D3044
Discussed with @wraitii

This was SVN commit r24402.

binaries/data/mods/public/simulation/components/UnitAI.js

@@ -161,16 +161,6 @@ UnitAI.prototype.UnitFsmSpec = {
 
 	// Default event handlers:
 
-	"MovementUpdate": function(msg) {
-		// ignore spurious movement messages
-		// (these can happen when stopping moving at the same time
-		// as switching states)
-	},
-
-	"ConstructionFinished": function(msg) {
-		// ignore uninteresting construction messages
-	},
-
 	"LosRangeUpdate": function(msg) {
 		// Ignore newly-seen units by default.
 	},
@@ -191,18 +181,10 @@ UnitAI.prototype.UnitFsmSpec = {
 		// ignore
 	},
 
-	"PackFinished": function(msg) {
-		// ignore
-	},
-
 	"PickupCanceled": function(msg) {
 		// ignore
 	},
 
-	"TradingCanceled": function(msg) {
-		// ignore
-	},
-
 	"GuardedAttacked": function(msg) {
 		// ignore
 	},