Popups is out of beta feature and this code is no longer needed.
Removing code is the happiest activity a developer can do.
Other changes:
* Remove redundant type field on extension.json
(If not set, the extension will default to the "other" section.)
* Repurpose `name` with `namemsg` and make use of existing i18n
messages
Bug: T193053
Change-Id: Iea832cd1f37b0e7df6ff95efd66e4a1ff2a9004e
This is the first patch using the new format of
rtl/ltr icons, which was made possible in
I1c72aaa3f847b1b7679113f2b88cbb92adf0f936
Change-Id: Ieca7cfc5efaf1494b80d554c476a4d61958b0661
