refactor: remove unused imports in create_proposal.ts for cleaner code

src/tools/squads_multisig/create_proposal.ts

@@ -1,16 +1,4 @@
 import { SolanaAgentKit } from "../../index";
-import {
-  PublicKey,
-  SystemProgram,
-  TransactionInstruction,
-  TransactionMessage,
-} from "@solana/web3.js";
-import { LAMPORTS_PER_SOL } from "@solana/web3.js";
-import {
-  getAssociatedTokenAddress,
-  createTransferInstruction,
-  getMint,
-} from "@solana/spl-token";
 import * as multisig from "@sqds/multisig";
 const { Multisig } = multisig.accounts;