usb-boot: Remove prebuilt fel boot binaries

They were all built with no version information so it's not trivial to tell which sources they are built from. It is very easy to rebuild u-boot which gives these. Not really a need to have them prebuilt here.

usb-boot: Remove prebuilt fel boot binaries
They were all built with no version information so it's not trivial to tell which sources they are built from. It is very easy to rebuild u-boot which gives these. Not really a need to have them prebuilt here.
6f5049ff · Henrik Nordstrom · c20d395d · c20d395d · c20d395d · c20d395d
Commit 6f5049ff authored Jul 27, 2013 by Henrik Nordstrom
--- a/bin/fel-boot-a13_olinuxino.bin
+++ b/bin/fel-boot-a13_olinuxino.bin
--- a/bin/fel-boot-cubieboard.bin
+++ b/bin/fel-boot-cubieboard.bin
--- a/bin/fel-boot-eoma68-a10.bin
+++ b/bin/fel-boot-eoma68-a10.bin
--- a/bin/fel-boot-mele_a1000.bin
+++ b/bin/fel-boot-mele_a1000.bin