ipn/store: make StateStore.All optional (#16409)

This method is only needed to migrate between store.FileStore and
tpm.tpmStore. We can make a runtime type assertion instead of
implementing an unused method for every platform.

Updates #15830

Signed-off-by: Andrew Lytvynov <awly@tailscale.com>

cmd/tsconnect/src/lib/js-state-store.ts

@@ -10,7 +10,4 @@ export const sessionStateStorage: IPNStateStorage = {
   getState(id) {
     return window.sessionStorage[`ipn-state-${id}`] || ""
   },
-  all() {
-    return JSON.stringify(window.sessionStorage)
-  },
 }

cmd/tsconnect/src/types/wasm_js.d.ts

@@ -44,7 +44,6 @@ declare global {
   interface IPNStateStorage {
     setState(id: string, value: string): void
     getState(id: string): string
-    all(): string
   }
 
   type IPNConfig = {