Implement removeStrategyFromQueue

[MickdeGraaf]

User Story

• As an <audience/user>: PieVault admin
• I want to <action/task>: be able to remove a strategy from the withdrawal queue
• so that <outcome/goal/benefit>: exclude it from being exited on a end user's withdraw

Type

• Enhancement
• Maintenance
• Refactor

Description

Definition of Done

• Implement removeStrategyFromQueue
• Unit test removeStrategyFromQueue

Part of #30
See Yearn implementation