Bug 854494 - [MMS][SMS] Remove the "no results returned" message from contact lookup r=julienw

- Removes "no-results" key from locale files
- Remove comments
- Remove the "no results returned" message from contact lookup

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Merge pull request #8974 from rwldrn/854494

Bug 854494 - [MMS][SMS] Remove the "no results returned" message from contact lookup