ci: Remove unused canvas v1 related code from e2e tests (#15704)

cypress/utils/workflowUtils.ts

@@ -3,7 +3,3 @@ import { nanoid } from 'nanoid';
 export function getUniqueWorkflowName(workflowNamePrefix?: string) {
 	return workflowNamePrefix ? `${workflowNamePrefix} ${nanoid(12)}` : nanoid(12);
 }
-
-export function isCanvasV2() {
-	return Cypress.env('NODE_VIEW_VERSION') === 2;
-}