chore: remove unused code from nostr controller

src/controllers/NostrController.ts

@@ -37,13 +37,11 @@ import {
   RelayMap,
   RelayReadStats,
   RelayStats,
-  Rumor,
   SignedEvent
 } from '../types'
 import {
   compareObjects,
   getNsecBunkerDelegatedKey,
-  randomNow,
   verifySignedEvent
 } from '../utils'
 
@@ -306,24 +304,6 @@ export class NostrController extends EventEmitter {
     return event
   }
 
-  createSeal = async (rumor: Rumor, receiver: string) => {
-    const encryptedContent = await this.nip44Encrypt(
-      receiver,
-      JSON.stringify(rumor)
-    )
-
-    const unsignedEvent: UnsignedEvent = {
-      kind: 13,
-      content: encryptedContent,
-      created_at: randomNow(),
-      tags: [],
-      pubkey: (store.getState().auth as AuthState).usersPubkey!
-    }
-
-    const signedEvent = await this.signEvent(unsignedEvent)
-    return signedEvent
-  }
-
   nip44Encrypt = async (receiver: string, content: string) => {
     const loginMethod = (store.getState().auth as AuthState).loginMethod