gnu: Remove linux-libre 6.8.
* gnu/packages/linux.scm (linux-libre-6.8-version, linux-libre-6.8-gnu-revision,
deblob-scripts-6.8, linux-libre-6.8-pristine-source, linux-libre-6.8-source,
linux-libre-headers-6.8, linux-libre-6.8): Remove variables.
* gnu/packages/aux-files/linux-libre/6.8-arm.conf,
gnu/packages/aux-files/linux-libre/6.8-arm64.conf,
gnu/packages/aux-files/linux-libre/6.8-riscv.conf
gnu/packages/aux-files/linux-libre/6.8-i686.conf,
gnu/packages/aux-files/linux-libre/6.8-x86_64.conf: Delete files.
* Makefile.am (AUX_FILES): Remove aforementioned .conf files.
Signed-off-by: Leo Famulari <leo@famulari.name>
Change-Id: Ib94c61f629721f94a307e51b449e5ccd117a2f9a
6fad0fd1c3