fix: now able to delete schedule even if active

[Wizardbacon13]

Fixes #401

First 2 images was after changes, third image is before changes

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This change is 

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: src/pages/background/lib/deleteSchedule.ts

Function	Unhandled Issue
deleteSchedule	Error: Cannot delete active schedule deleteSchedu... Event Count: 3 Affected Users: 2
deleteSchedule	Error: Schedule DAizJ8QmGuu7 does not exist delet... Event Count: 1 Affected Users: 8

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