internal: incomplete vault systems behind feature flag (#2340)

packages/snjs/lib/Strings/Input.ts

@@ -1,3 +0,0 @@
-export const InputStrings = {
-  FileAccountPassword: 'File account password',
-}

packages/snjs/lib/Strings/index.ts

@@ -1,9 +1,7 @@
 import { ConfirmStrings } from './Confirm'
-import { InputStrings } from './Input'
 import { NetworkStrings } from './Network'
 
 export const Strings = {
   Network: NetworkStrings,
   Confirm: ConfirmStrings,
-  Input: InputStrings,
 }