removed specify dependency from extension to app
removed specify dependency from extension to app

fixes #1913

themccallister/yii2-app-basic,CanDo-com/yii2-app-basic,tigokr/intermedia_test_0,IngridMendes/boigalera,andreybolonin/yii2-app-basic,DawidMyslak/home-budget,DawidMyslak/home-budget,jacmoe/yii2-app-basic-zurbified,tird/yii2-app-basic,wojtonow/yii2-basic,tiagocardosos/yii2-sample-app-urlshortener-mongo,IngridMendes/boigalera,AdeAttwood/Yii2-Basic-Grunt,callmez/yii2-app-wechat,tigokr/intermedia_test_0,fredyns/shippingweight,yiisoft/yii2-app-basic,dasscheman/yii2-app-basic,CanDo-com/yii2-app-basic,wartron/yii2-app-basic-account,githubjeka/yii2-app-basic,hanupas/dev-ops-yii2-app-basic,OrlandoST/instapro,jacmoe/yii2-app-basic-zurbified,matperez/yii2-app-basic-with-environments,marianturchyn/yii2-app-basic,aerios/dev-ops-yii2-app-basic,pana1990/yii2-app-basic,alfredleo/yii2-app-basic,OrlandoST/yii2-app-basic,wojtonow/yii2-basic,IngridMendes/boigalera,cbn052293/Test_Yii,OrlandoST/yii2-app-basic,githubjeka/yii2-app-basic,dasscheman/yii2-app-basic,krissss/yundou,novomirskoy/yii2gallery,adiferd/dev-ops-yii2-app-basic,AdeAttwood/Yii2-Basic-Grunt,OrlandoST/instapro,yiisoft/yii2-app-basic,matperez/yii2-app-basic-with-environments,AdeAttwood/Yii2-Basic-Grunt,jarioneto/yii2-app-rest,fredyns/shippingweight,karoldanutama/dev-ops-yii2-app-basic,novomirskoy/yii2gallery,Vitashev/yii2-app-basic