remove copperhead (closes #314)

yaml/degoogle.yml

@@ -839,11 +839,6 @@ operating systems:
       eyes: null
       text: |
         [Open-source](https://github.com/GrapheneOS) Android-based OS with an emphasis on security and privacy. Features advanced hardening and privacy protections throughout the system.
-    - name: CopperheadOS
-      url: https://copperhead.co/android
-      eyes: 5-eyes
-      text: |
-        A security and privacy focused mobile operating system compatible with Android apps. Available as Google-free secure Android on the latest secure android phone.
     - name: postmarketOS
       url: https://postmarketos.org/
       eyes: null