sdk: rm unused param

Author: crispheaney

sdk/src/driftClient.ts

@@ -9241,7 +9241,6 @@ export class DriftClient {
 	public async updateUserGovTokenInsuranceStake(
 		authority: PublicKey,
 		txParams?: TxParams,
-		env: DriftEnv = 'mainnet-beta'
 	): Promise<TransactionSignature> {
 		const ix = await this.getUpdateUserGovTokenInsuranceStakeIx(authority);
 		const tx = await this.buildTransaction(ix, txParams);