This reverts commit d83bb25 from #2500.

…dev mode)

* Eliminate need for keeping forked version of admin-bar.css in plugin.
* Automatically add data-ampdevmode attributes to scripts and styles that depend on the admin bar, excluding them from being sanitized out of the document.
* Skip processing stylesheets that have data-ampdevmode attributes.

Also add missing dynamic_element_selectors arg to stylesheet cache key.

…s for dev mode elements

…y for unauthenticated admin bars

Refactor methods to improve readability and organization

Add todo comments for where dev mode should be used instead of allow_dirty_*.
Make closures static.

Co-Authored-By: Alain Schlesser <alain.schlesser@gmail.com>

…ode-support

* 'develop' of github.com:ampproject/amp-wp: (28 commits)
  Exclude development files from production build ZIPs
  Add filter to allow more video types in AMP story background se… (#3171)
  Update dependency @babel/cli to v7.6.0 (#3203)
  Update dependency @babel/core to v7.6.0 (#3204)
  Remove deprecated AMP_WP_Utils class
  Refresh Composer lock file
  Run build in a temporary folder
  Add shell script to clean up the current folder and then trigger a build
  Adapt Gruntfile to fetch optimized Composer dependencies within the build folder
  Retrieve Sabberworm patch directly from the GitHub PR
  Adding regression test for vertical text alignment issues
  Fixing minor errors in test descriptions
  Only restrict height inside non-fit text blocks
  Rewritten block size tests
  Limit height declaration to only direct descendant
  Remove now obsolete withEnforcedVideoUploadType HOC
  Update eslint-plugin-jest and apply fixes (#3192)
  Update dependency postcss to v7.0.18 (#3200)
  Update dependency terser-webpack-plugin to v2 (#3195)
  Update dependency webpack-cli to v3.3.8 (#3194)
  ...

…min bar

…cons