Remove Deprecated `webpa-common`

[denopink]

This ticket outlines a general todo list for the removal of webpa-common

TODO

• [x] Review usage & outline replacements
• [x] Update dependencies
  • https://github.com/xmidt-org/themis/issues/108

[denopink]

no additional work is required, webpa-common is not used in argus

[denopink]

We'll have to update it's dependencies that leverage webpa-common