Bug 1339400 - Removed the leftover silhouette-40.svg files. Removed the instances of the svg file in the respective jar.mn. RM'd the files to make sure mercurial stops tracking the deleted files now. r=florian

MozReview-Commit-ID: LXsiHUfUdvd

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extra : rebase_source : c648304dc2695d509f2cc7f35bbccd3d79bdfc3a