You can remove the "Select Category" or "Select Location" dropdown list from your calendar view by doing to following:
Login to Calendar as Administrator > Go to Admin Menu -> under Calendar Settings > Calendar Options > Under View Controls > check "hide category selection list" or check "hide location selection list" > Save
Additional Information that may relate to this option:
To create a link to your calendar displays a specific category or a combination of categories, we recommend that you use our Website Integration tool. Go to Admin Menu > under Website Plugins > Website Integration
For more on creating a direct link that displays a single category or combination of categories follow the link below: