Remove highlight on course section cards on hover
Summary
Course section cards have a highlight when they are hovered on that is quite ugly.

Remove this effect.
cc. @ksarkhel for suggesting this
Helpful Links
The CSS that needs to be removed/changed can be found here https://git.gmu.edu/srct/schedules/blob/master/schedules/app/assets/stylesheets/application.scss#L58
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