CI: Drop automation/configs/

Having 3 extra hypervisor builds on the end of a full build is deeply
confusing to debug if one of them fails, because the .config file presented in
the artefacts is not the one which caused a build failure.  Also, the log
tends to be truncated in the UI.

PV-only is tested as part of PV-Shim in a full build anyway, so doesn't need
repeating.  HVM-only and neither appear frequently in randconfig, so drop all
the logic here to simplify things.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Michal Orzel <michal.orzel@amd.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
(cherry picked from commit 7b20009a81)

automation/configs/x86/hvm_only_config

@@ -1,3 +0,0 @@
-CONFIG_HVM=y
-# CONFIG_PV is not set
-# CONFIG_DEBUG is not set

automation/configs/x86/no_hvm_pv_config

@@ -1,3 +0,0 @@
-# CONFIG_HVM is not set
-# CONFIG_PV is not set
-# CONFIG_DEBUG is not set

automation/configs/x86/pv_only_config

@@ -1,3 +0,0 @@
-CONFIG_PV=y
-# CONFIG_HVM is not set
-# CONFIG_DEBUG is not set

automation/scripts/build

@@ -48,18 +48,3 @@ mkdir binaries
 if [[ "${XEN_TARGET_ARCH}" == "x86_64" ]]; then
     cp xen/xen binaries/xen
 fi
-
-# Build all the configs we care about
-case ${XEN_TARGET_ARCH} in
-    x86_64) arch=x86 ;;
-    *) exit 0 ;;
-esac
-
-cfg_dir="automation/configs/${arch}"
-for cfg in `ls ${cfg_dir}`; do
-    echo "Building $cfg"
-    make -j$(nproc) -C xen clean
-    rm -f xen/.config
-    make -C xen KBUILD_DEFCONFIG=../../../../${cfg_dir}/${cfg} XEN_CONFIG_EXPERT=y defconfig
-    make -j$(nproc) -C xen XEN_CONFIG_EXPERT=y
-done