Revert ":hostonly is a valid network type"

This reverts commit 451b6b285d9d381330b13203ba933e53c75eb01a.
Reverting hostonly network changes
Reverting hostonly network changes
Revert "Add the :hostonly network option to the network build process"

This reverts commit c6b205cf3ca9164571540209b7d5053bc8635499.