Remove all //blimp code.

blimp/docs/fonts.md

-# Updating Blimp Fonts
-
-1.  Clone the git-repositories listed in
-    `//third_party/blimp_fonts/README.chromium`, and roll forward to the commit
-    you want.
-1.  Copy the necessary files to `//third_party/blimp_fonts/font_bundle`.
-1.  Verify that the `fonts.xml` file include the correct fonts.
-1.  Verify that the `LICENSE` file is still up to date and lists all relevant
-    licenses and which fonts use which license.
-1.  Update the `//third_party/blimp_fonts` target to include all the
-    current fonts and their license files.
-1.  Run the `upload_to_google_storage.py` (from depot_tools) script to upload
-    the files. You must do this in the `//third_party/blimp_fonts` directory.
-    To do this, execute:
-
-    ```bash
-    upload_to_google_storage.py --archive -b chromium-fonts font_bundle
-    ```
-
-1.  Add all the `font_bundle.tar.gz.sha1` file to the chromium src repository,
-    by executing the following command:
-
-    ```bash
-    git add ./third_party/blimp_fonts/font_bundle.tar.gz.sha1
-    ```
-
-1.  Commit and upload the change for review:
-
-    ```bash
-    git commit
-    git cl upload
-    ```