remove the backup check notification and route

it seems we decided that instead of a notification, we display a warning in
the backups view itself (see #719).

src/routes/test/backups-test.js

@@ -5,7 +5,7 @@
 
 'use strict';
 
-var appdb = require('../../appdb.js'),
+const appdb = require('../../appdb.js'),
     async = require('async'),
     constants = require('../../constants.js'),
     database = require('../../database.js'),
@@ -108,35 +108,4 @@ describe('Backups API', function () {
                 });
         });
     });
-
-    describe('check', function () {
-        it('fails due to mising token', function (done) {
-            superagent.get(SERVER_URL + '/api/v1/backups/check')
-                .end(function (error, result) {
-                    expect(result.statusCode).to.equal(401);
-                    done();
-                });
-        });
-
-        it('fails due to wrong token', function (done) {
-            superagent.get(SERVER_URL + '/api/v1/backups/check')
-                .query({ access_token: token.toUpperCase() })
-                .end(function (error, result) {
-                    expect(result.statusCode).to.equal(401);
-                    done();
-                });
-        });
-
-        it('succeeds', function (done) {
-            superagent.get(SERVER_URL + '/api/v1/backups/check')
-                .query({ access_token: token })
-                .end(function (error, result) {
-                    expect(result.statusCode).to.equal(200);
-                    expect(result.body.ok).to.equal(false);
-                    expect(result.body.message).to.not.be.empty();
-
-                    done();
-                });
-        });
-    });
 });