Remove bootstrap styling from sensor.html

[daisycrego]

Title

Remove bootstrap styling from sensor page. Not working currently.

Types of Changes

Put an x in the boxes that apply

• [ ] Feature (non-breaking change which adds functionality)
• [x] Bug Fix (non-breaking change that fixes an issue)
• [ ] Breaking Change (feature/fix that causes existing features to not work as expected)
• [ ] Documentation

Checklist

• [ ] I have read the [contribute]contributing doc - tbd
• [x] Classes, scripts, and environment variables follow existing naming convention
• [x] Lint and Unit tests pass locally
• [x] New features on hardware have been tested on a local Raspberry Pi
• [x] Mention new programs/binaries if any must be installed along with this change
• [x] Mention new environment variables if any have been added to hardware/env file
• [x] Test coverage should not drop more than 3%
• [x] Any new required python modules are added to the requirements.txt