fix(auth): Remove duplicate AtomicResult (#1133)

* Remove duplicate AtomicResult

* Rename result

Author: dnys1

packages/amplify_auth_cognito/android/src/main/kotlin/com/amazonaws/amplify/amplify_auth_cognito/device/DeviceHandler.kt

@@ -49,8 +49,7 @@ class DeviceHandler(private val errorHandler: AuthErrorHandler) :
     private val scope = CoroutineScope(Dispatchers.IO) + CoroutineName("DeviceHandler")
 
     @Suppress("UNCHECKED_CAST")
-    override fun onMethodCall(call: MethodCall, _result: MethodChannel.Result) {
-        val result = AtomicResult(_result, call.method)
+    override fun onMethodCall(call: MethodCall, result: MethodChannel.Result) {
         when (call.method) {
             "fetchDevices" -> fetchDevices(result)
             "rememberDevice" -> rememberDevice(result)
@@ -116,4 +115,4 @@ class DeviceHandler(private val errorHandler: AuthErrorHandler) :
             }
         }
     }
-}
+}