Issue 724 remove free 2g text

[kenmanheimer]

Quick turnaround from our translators, on this small change.

For future reference, here are the steps I went through:

Prepare changes for translators:

• Remove text to be omitted from template
• Remove text from en-GB.txt, both source and translation
• Remove text from source of all locales - this conveys changes to translators
• What about other brands?
  • Blackphone: independently adjust Blackphone template and text, as needed.
  • Distinct blackphone source and translations can go in en-GB, with corresponding source entries in other locale files
  • It so happens that the changed item is identical with the one in the corresponding plain SpiderOak template, so no special translation change.
  • Private clients: we don't provide affected ones with non-english versions.
• produce xliff from json: 'grunt xliff:from_json'
• Do a git commit, for a waymark.

Send xliff files to Teri, MTWI:

• Include xliff files with changes
• And include text identifying the changed entries
  • itemized in the email message text.
  • including the xliff trns-unit id for each

Receive and incorporate the translations, via xliff:

• copy over the (already committed) previous versions
• sanity check by inspecting differences with the prior versions
• institute changes in the json: 'grunt xliff:to_json'
• commit.