Twenty Fifteen: removing unused styles.

Props iamtakashi, fixes #30578.


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Twenty Fifteen: It's about time we call it one point oh.

Closes #30502.


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Editor show the DFW v2 pointer for users that have disabled the visual editor. Fixes #30458.
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Twenty Fifteen: updating everything to one point oh.

See #30502.


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Twenty Fifteen: updating one point oh version number in .pot.

Props ocean90, see #30502.


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