Modernise link warning dialog (#8243)

* add link warning dialog

* add copy for if sharing

* delete old modal

* get web working

src/state/modals/index.tsx

@@ -43,13 +43,6 @@ export interface ChangePasswordModal {
   name: 'change-password'
 }
 
-export interface LinkWarningModal {
-  name: 'link-warning'
-  text: string
-  href: string
-  share?: boolean
-}
-
 export type Modal =
   // Account
   | DeleteAccountModal
@@ -67,9 +60,6 @@ export type Modal =
   | WaitlistModal
   | InviteCodesModal
 
-  // Generic
-  | LinkWarningModal
-
 const ModalContext = React.createContext<{
   isModalActive: boolean
   activeModals: Modal[]