remove powerpc64 from releases as well

Author: ndusart

.github/workflows/release.yml

@@ -85,11 +85,6 @@ jobs:
           rust: stable
           target: armv7-unknown-linux-musleabi
           features: vendored-openssl
-        - build: stable-powerpc64
-          os: ubuntu-latest
-          rust: stable
-          target: powerpc64-unknown-linux-gnu
-          features: vendored-openssl
         - build: stable-s390x
           os: ubuntu-latest
           rust: stable