Remove unused verification materials

sigstore-java/src/main/resources/dev/sigstore/tuf/README.md

@@ -1,21 +1,3 @@
 # TUF Store
 
-This resource is a temporary alternative to an actual TUF client.
-This is **not a permanent solution** and should not be treated as such.
-If the key changes, they will not automatically be reflected here
-and various signing/verification workflows will fail.
-
-We keep copies of the remote tuf repositories locally in
-1. Production from https://tuf-repo-cdn.sigstore.dev \
-   for interfacing with *.sigstore.dev
-
-2. Staging from https://tuf-repo-cdn.sigstage.dev \
-   for interfacing with *.sigstage.dev
-
-For this client to function we need the following keys
-1. CTFE public keys (`ctfe.pub`, `ctfe_*.pub`) \
-   the public key for the certificate transparency log
-2. Fulcio root cert (`fulcio_v1.crt.pem` or `fulcio.crt.pem`) \
-   the root certificate for fulcio issued certificates
-3. Rekor public key (`rekor.pub`) \
-   the public key for the rekor transparency log
+Seed roots for sigstore public good and staging.