Revert "CI: Enable building of the images with and without initramfs"

.github/workflows/build-template.yml

@@ -31,7 +31,6 @@ env:
   DISTRO: poky
   TCLIBC: glibc musl
   KERNELS: linaro-qcomlt yocto
-  INITRAMFS: initramfs-rootfs-image ~
 
 jobs:
   build:
@@ -70,20 +69,18 @@ jobs:
 
         for tclibc in ${TCLIBC}; do
         for kernel in ${KERNELS}; do
-        for initramfs in ${INITRAMFS}; do
         cat << EOF >> plan.yaml
         ${tclibc}-${kernel}: &${tclibc}-${kernel}
           local_conf:
             - INHERIT += 'buildstats buildstats-summary'
             - INHERIT:remove = 'rm_work'
             - TCLIBC := '${tclibc}'
             - PREFERRED_PROVIDER_virtual/kernel := 'linux-${kernel}'
-            - INITRAMFS_IMAGE := '${initramfs}'
+            - INITRAMFS_IMAGE ?= 'initramfs-rootfs-image'
 
         EOF
         done
         done
-        done
 
         cat << EOF >> plan.yaml
         jobs: