remove impish

- RandomCoderOrg/ubuntu-on-android#178

Author: SaicharanKandukuri

.github/workflows/build-and-release.yml

@@ -22,7 +22,6 @@ jobs:
           git submodule update
       - name: Build tarballs
         run: |
-          sudo bash build.sh -s impish -v raw -a all
           sudo bash build.sh -s jammy -v raw -a all
           sudo bash build.sh -s kinetic -v raw -a all