Yoga Docs: Delete the Old website (#1612)

Summary:
Pull Request resolved: https://github.com/facebook/yoga/pull/1612

Moving new website to `/website` before publishing, so that edit links point to the right eventual place in the GitHub repo.

Reviewed By: joevilches

Differential Revision: D54837808

fbshipit-source-id: 46de8a638ad9bce18558fd768ed8c080892b828e

.github/actions/setup-website/action.yml

@@ -1,23 +0,0 @@
-name: Setup Website envirionment
-
-runs:
-  using: "composite"
-  steps:
-    # TODO: Update to latest when website is moved to the workspace version of
-    # yoga-layout
-    - name: Setup Node environment
-      uses: actions/setup-node@v3
-      with:
-        node-version: 12.x
-        cache: yarn
-        cache-dependency-path: website/yarn.lock
-      env:
-        # https://github.com/actions/setup-node/issues/317
-        FORCE_COLOR: 0
-
-    # TODO: the website should be in a yarn workspace with the library, but the
-    # current version of gatsby is incompatible with hoisting.
-    - name: yarn install
-      shell: bash
-      run: yarn install --frozen-lockfile --network-timeout 1000000
-      working-directory: website