Removed other skins of iCheck except for flat

Getting the following errors as these Skins are not present on AdminLte. 

GET http://localhost:3000/assets/iCheck/minimal/_all.css 404 (Not Found) tickets:12
GET http://localhost:3000/assets/iCheck/square/_all.css 404 (Not Found) tickets:12
GET http://localhost:3000/assets/iCheck/line/_all.css 404 (Not Found) tickets:12
GET http://localhost:3000/assets/iCheck/polaris/polaris.css 404 (Not Found) tickets:12
GET http://localhost:3000/assets/iCheck/futurico/futurico.css 404 (Not Found) tickets:12

So removed them from import list.