Remove deprecated / unused `procedureWillCancel(withErrors:)` method from ProcedureProtocol
Remove deprecated / unused `procedureWillCancel(withErrors:)` method from ProcedureProtocol


danthorpe/Operations,ProcedureKit/ProcedureKit,danthorpe/Operations,ProcedureKit/ProcedureKit,danthorpe/Operations,ProcedureKit/ProcedureKit