Remove unused packages from composer.json

- Fix #941, resolve #941
- Remove unused packages from composer.json
- Update composer.lock

composer.json

@@ -20,7 +20,6 @@
         "omnipay/stripe": "dev-master",
         "laravel/framework": "5.2.*",
         "laravelcollective/html": "5.2.*",
-        "laravelcollective/bus": "5.2.*",
         "symfony/css-selector": "~3.0",
         "patricktalmadge/bootstrapper": "5.5.x",
         "anahkiasen/former": "4.0.*@dev",
@@ -28,8 +27,6 @@
         "omnipay/omnipay": "~2.3",
         "intervention/image": "dev-master",
         "webpatser/laravel-countries": "dev-master",
-        "doctrine/dbal": "2.5.x",
-        "jsanc623/phpbenchtime": "2.x",
         "lokielse/omnipay-alipay": "dev-master",
         "coatesap/omnipay-datacash": "~2.0",
         "mfauveau/omnipay-pacnet": "~2.0",