Add toast to LED page

Toast error notification alerts user if LED light switch was
not successful.

Change-Id: I4f7af80276b6fefa93c8d0f0f50f8b28a06bced3
Signed-off-by: beccabroek <beccabroek@gmail.com>
diff --git a/app/common/services/api-utils.js b/app/common/services/api-utils.js
index 9e458aa..0de6b1f 100644
--- a/app/common/services/api-utils.js
+++ b/app/common/services/api-utils.js
@@ -838,29 +838,14 @@
                   });
           return deferred.promise;
         },
-        setLEDState: function(state, callback) {
-          $http({
+        setLEDState: function(state) {
+          return $http({
             method: 'PUT',
             url: DataService.getHost() +
                 '/xyz/openbmc_project/led/groups/enclosure_identify/attr/Asserted',
             withCredentials: true,
             data: JSON.stringify({'data': state})
           })
-              .then(
-                  function(response) {
-                    var json = JSON.stringify(response.data);
-                    var content = JSON.parse(json);
-                    if (callback) {
-                      return callback(content.status);
-                    }
-                  },
-                  function(error) {
-                    if (callback) {
-                      callback(error);
-                    } else {
-                      console.log(error);
-                    }
-                  });
         },
         bmcReboot: function(callback) {
           $http({