[Build] Remove unused variables

...to satisfy JSHint

platform/persistence/couch/src/CouchIndicator.js

@@ -74,7 +74,7 @@ define(
 
 
             // Callback if the HTTP request to Couch fails
-            function handleError(err) {
+            function handleError() {
                 self.state = DISCONNECTED;
             }
 

platform/persistence/couch/src/CouchPersistenceProvider.js

@@ -116,7 +116,7 @@ define(
             return this.$q.when(this.spaces);
         };
 
-        CouchPersistenceProvider.prototype.listObjects = function (space) {
+        CouchPersistenceProvider.prototype.listObjects = function () {
             return this.get("_all_docs").then(bind(getIdsFromAllDocs, this));
         };
 

platform/persistence/elastic/src/ElasticPersistenceProvider.js

@@ -157,7 +157,7 @@ define(
                 .then(checkUpdate);
         };
 
-        ElasticPersistenceProvider.prototype.deleteObject = function (space, key, value) {
+        ElasticPersistenceProvider.prototype.deleteObject = function (space, key) {
             return this.del(key).then(bind(this.checkResponse, this));
         };
 

platform/persistence/elastic/src/ElasticSearchProvider.js

@@ -73,7 +73,7 @@ define([
             })
             .then(function success(succesResponse) {
                 return provider.parseResponse(succesResponse);
-            }, function error(errorResponse) {
+            }, function error() {
                 // Gracefully fail.
                 return {
                     hits: [],

platform/persistence/local/src/LocalStoragePersistenceProvider.js

@@ -79,7 +79,7 @@ define(
             return this.$q.when(spaceObj[key]);
         };
 
-        LocalStoragePersistenceProvider.prototype.deleteObject = function (space, key, value) {
+        LocalStoragePersistenceProvider.prototype.deleteObject = function (space, key) {
             var spaceObj = this.getValue(space);
             delete spaceObj[key];
             this.setValue(space, spaceObj);