remove accidental doubling of OpenSUSE logo in icons array for install page

Jamie Reidrequested to merge
fix-raspberry-pi-logo into master

Currently the OpenSUSE logo is shown for the Raspberry Pi 2 install button on about.gitlab.com/install.

I removed what appears to be an erroneously-double-inserted opensuse entry in the icons array for the install page.

Tested locally with middleman to good result.

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