How to remove block in colorbox?
Is the block appearing as part of the view, or just in the Colorbox? If it's just showing in the colorbox, and you go into Structure > Blocks, you should see that "HR Admin" block listed - you can set it to show only on the pages where you want it to appear. You can read about the visibility settings in the Block documentation. If it is appearing in your view, you may have to give more details for troubleshooting. 

This answer may help: How to disable a block on a certain view?