Fixes #7103: Remove unused library to fix 'npm install'.
Merge pull request #4586 from ehelms/fixes-7103

Fixes #7103: Remove unused library to fix 'npm install'.
Fixes #6815,#6187/bz1125398,1125358 - Environment Destroy Dynflow

This commit adds code to orchestrate lifecycle env destroy via dynflow.
In addition to that it adds code to prevent environment deletion if any
of the lifecycle env associations like content hosts and activation keys