refactor(types): remove dead provider view types superseded by bindings

Drop the handwritten IProxyProviderItem and IRuleProviderItem
interfaces: IProxyProviderItem is a stale duplicate of the generated
ProxyProviderView contract, and neither has any references left in
the tree.

Keep IProxyItem and IProxyGroupItem: IConfigData still declares
'proxy-groups'?: IProxyGroupItem[], which builds on IProxyItem.

src/types/global.d.ts

@@ -105,30 +105,6 @@ type IProxyGroupItem = Omit<IProxyItem, 'all'> & {
   all: IProxyItem[]
 }
 
-interface IProxyProviderItem {
-  name: string
-  type: string
-  proxies: IProxyItem[]
-  updatedAt: string
-  vehicleType: string
-  subscriptionInfo?: {
-    Upload: number
-    Download: number
-    Total: number
-    Expire: number
-  }
-}
-
-interface IRuleProviderItem {
-  name: string
-  behavior: string
-  format: string
-  ruleCount: number
-  type: string
-  updatedAt: string
-  vehicleType: string
-}
-
 interface ITrafficItem {
   up: number
   down: number