fix: linter warnings

Author: mormubis

packages/rum-core/src/boot/preStartRum.spec.ts

@@ -29,7 +29,6 @@ import { ActionType, VitalType } from '../rawRumEvent.types'
 import type { RumPlugin } from '../domain/plugins'
 import { createCustomVitalsState } from '../domain/vital/vitalCollection'
 import type { ManualAction } from '../domain/action/trackManualActions'
-import type { RumSessionManager } from '../domain/rumSessionManager'
 import type { RumPublicApi, RumPublicApiOptions, Strategy } from './rumPublicApi'
 import type { StartRumResult } from './startRum'
 import type { DoStartRum } from './preStartRum'