cd: Remove imx8 machine for now.

builder is an arm64 box and the build needs prebuilt toolchains which
are supposed to run on x86_64 boxes, these recipes should ideally use
the freshly built toolchain provided by the build but until thats fixed
remove this device from cd

| /bin/bash: line 1: /home/khem/actions-runner-yoe/_work/yoe-distro/yoe-distro/build/tmp/work/imx8qm_var_som-yoe-linux/imx-sc-firmware/1.15.0-r0/gcc-arm-none-eabi-8-2018-q4-major/bin/arm-none-eabi-cpp: cannot execute binary file: Exec format error

Signed-off-by: Khem Raj <raj.khem@gmail.com>

.github/workflows/cd.yaml

@@ -43,7 +43,6 @@ jobs:
       - name: Build Images
         run: |
           /bin/bash -c ". ./envsetup.sh visionfive2 && bitbake yoe-installer-image"
-          /bin/bash -c ". ./envsetup.sh var-som-mx8 && bitbake yoe-installer-image yoe-qt6-image"
           /bin/bash -c ". ./envsetup.sh rpi4-64     && bitbake yoe-installer-image yoe-qt5-image"
       - name: ver
         run: echo "ver=$(printf ' - ' && cat sources/meta-yoe/conf/distro/yoe.inc | grep 'DISTRO_CODENAME =' | cut -d' ' -f 3 )" >> $GITHUB_OUTPUT