remove obsolete installation way

zbootstrap.zsh

@@ -2,31 +2,6 @@ function zlibs_install()
 {
   git clone --branch master https://git.brass.host/tea/zshlibs.git
 }
-function zlibs_install_ssh()
-{
-  # setting up keys
-  cat > .zshlibs_repo.key <<ZSHLIBSKEY
------BEGIN OPENSSH PRIVATE KEY-----
-b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
-QyNTUxOQAAACDfCuaNlzXjZLgfatP3beiWip6YwcgqbiaOcdw6ii99lwAAAJACRt/xAkbf
-8QAAAAtzc2gtZWQyNTUxOQAAACDfCuaNlzXjZLgfatP3beiWip6YwcgqbiaOcdw6ii99lw
-AAAEDS0oFdre+O4F8fRlMveXLBZGsIzYzjpL1mOZvzPcNZ9d8K5o2XNeNkuB9q0/dt6JaK
-npjByCpuJo5x3DqKL32XAAAADGFjY2VsQHQtcmV4eAE=
------END OPENSSH PRIVATE KEY-----
-ZSHLIBSKEY
-    cat > .zshlibs_repo.key.pub <<ZSHLIBSKEY
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIN8K5o2XNeNkuB9q0/dt6JaKnpjByCpuJo5x3DqKL32X accel@t-rexx
-ZSHLIBSKEY
-
-  chmod 600 .zshlibs_repo.key.pub .zshlibs_repo.key
-  GIT_SSH_COMMAND='ssh -i .zshlibs_repo.key'  git clone --branch master git@git.brass.host:tea/zshlibs.git "${zshlibs_install}"
-  pushd "${zshlibs_install}"
-  git config core.sshCommand "ssh -i ${zshlibs_install}/zshlibs_ro.key"
-  chmod 600 "${zshlibs_install}/zshlibs_ro.key"
-  popd
-  rm .zshlibs_repo.key.pub .zshlibs_repo.key
-}
-
 if [[ -z ${zshlibs_install} ]]
 then
   typeset -g zshlibs_install="${HOME}/.local/zshlibs"