[mbosma] 20952: Delete libjpeg because sedwards and greatlord thought we should wait with jpeg support until the patent expired. If someone got a different opinion please take the issue to ros-dev.

Delete libjpeg because sedwards and greatlord thought we should wait
with jpeg support until the patent expired. If someone got a different
opinion please take the issue to ros-dev.
Deleted: vendor/libjpeg/