Fix warnings

Author: adamyanalunas

SwiftState/HierarchicalStateMachine.swift

@@ -82,7 +82,7 @@ public class HierarchicalStateMachine<S: StateType, E: StateEventType>: StateMac
     public override var state: State
     {
         // NOTE: returning `substate` is not reliable (as a spec), so replace it with actual `submachine.state` instead
-        let (submachine, substate) = self._submachineTupleForState(self._state)
+        let (submachine, _) = self._submachineTupleForState(self._state)
 
         if let submachine = submachine {
             self._state = "\(submachine.name).\(submachine.state)" as! State
@@ -110,7 +110,7 @@ public class HierarchicalStateMachine<S: StateType, E: StateEventType>: StateMac
 
         let condition: Condition = { transition -> Bool in
 
-            let (fromSubmachine, fromSubstate) = self._submachineTupleForState(route.transition.fromState)
+            let (fromSubmachine, _) = self._submachineTupleForState(route.transition.fromState)
             let (toSubmachine, toSubstate) = self._submachineTupleForState(route.transition.toState)
 
             //
@@ -139,9 +139,9 @@ public class HierarchicalStateMachine<S: StateType, E: StateEventType>: StateMac
 
         let fromState = self.state
         let toState = state
-        let transition = fromState => toState
+        _ = fromState => toState
 
-        let (fromSubmachine, fromSubstate) = self._submachineTupleForState(fromState)
+        let (fromSubmachine, _) = self._submachineTupleForState(fromState)
         let (toSubmachine, toSubstate) = self._submachineTupleForState(toState)
 
         // try changing submachine-internal state

SwiftState/StateMachine.swift

@@ -127,7 +127,7 @@ public class StateMachine<S: StateType, E: StateEventType>
     private class func _createUniqueString() -> String
     {
         var uniqueString: String = ""
-        for i in 1...8 {
+        for _ in 1...8 {
             uniqueString += String(UnicodeScalar(arc4random_uniform(0xD800))) // 0xD800 = 55296 = 15.755bit
         }
         return uniqueString
@@ -743,7 +743,7 @@ public class StateMachine<S: StateType, E: StateEventType>
         }
 
         // increment allCount (+ invoke chainErrorHandler) on any routes
-        handlerID = self.addHandler(nil => nil, order: 150) { [weak self] context in
+        handlerID = self.addHandler(nil => nil, order: 150) { context in
 
             shouldIncrementChainingCount = true
 
@@ -852,9 +852,7 @@ public class StateMachine<S: StateType, E: StateEventType>
 
     public func addEventHandler(event: Event, order: HandlerOrder, handler: Handler) -> HandlerID
     {
-        let transitions = self._routes[event]?.keys
-        
-        let handlerID = self.addHandler(nil => nil, order: order) { [weak self] context in
+        let handlerID = self.addHandler(nil => nil, order: order) { context in
             if context.event == event {
                 handler(context)
             }