If We Deactivate The Workflow, Scheduled Actions Will Be Removed From Queue Or Not?

I think after deleting it might be removed:

For example: There is a scenario

When a workflow rule that has time-dependent actions is triggered, use the workflow queue to view pending actions and cancel them if necessary.

To view pending actions:

Click Your Name | Setup | Monitoring | Time-Based Workflow.
Click Search to view all pending actions for any active workflow rules, or set the filter criteria and click Search to view only the pending actions that match the criteria. The filter options are:Workflow Rule Name: The name of the workflow rule.
Object: The object that triggered the workflow rule. Enter the object name in the singular form.
Scheduled Date: The date the pending actions are scheduled to occur.
Create Date: The date the record that triggered the workflow was created.
Created By: The user who created the record that triggered the workflow rule.
Record Name: The name of the record that triggered the workflow rule.
The filter is not case-sensitive. For more information on filters, see Entering Filter Criteria.
To cancel pending actions:Select the box next to the pending actions you want to cancel. Optionally, check the box in the column header to select all currently displayed items.
Click Delete.

Hope this will help you

Thanks