Removed 'mwe-upwiz-source-thirdparty-license' from i18n

Since there was no use of this message anywhere so simply removed it from i18n.

Bug: 29964
Change-Id: I101775731e3508e0ec4ac8d7e632c58c2ebd8dbe
Merge "Removed 'mwe-upwiz-source-thirdparty-license' from i18n"