Revert "Point the Parsoid cache in labs to parsoid-spof rather than deployment-parsoid2"

Doesn't work very well because it tries to pull data from
production wikis rather than labs wikis :(

This reverts commit ca549f381e89e0b92254613b90c06e0e063a2fe0

Bug: 49703
Change-Id: Iacc9e88ec83e9037abe9ace53deccafcf68a6bbb