Improper syntax for some @keyframe animations

[jeffgolenski]

While working with @dereksmart in dops-components we ended up following a trail back to calypso and finding some @keyframe animations with improper syntax. My guess is that these aren't working at all due to the quotations, and are throwing some scss errors somewhere - I haven't tested it.

https://github.com/Automattic/wp-calypso/blob/master/assets/stylesheets/shared/_animation.scss#L231

Problem:
On lines 232, 241, 245, and 251, the @keyframes animation names are wrapped in quotes and shouldn't be. (unless there's some black magic occurring I'm not aware of)

Fix:
Remove quotes around keyframe animation names.

Visual:

[lancewillett]

Fixed in 7d14601