Disable rocky linux test CI job

These tests are stubbed out / don't do anything
and I can't figure out why Rocky is failing downloading
GH artifacts. So disable it for now

Author: LegNeato

.github/workflows/ci_linux.yml

@@ -249,9 +249,6 @@ jobs:
           - name: Ubuntu-24.04 / CUDA-12.8.1 / ARM64
             image: "ghcr.io/rust-gpu/rust-cuda-ubuntu24-cuda12:latest"
             runner: ubuntu-24.04-arm
-          - name: RockyLinux-9 / CUDA-12.8.1 / x86_64
-            image: "ghcr.io/rust-gpu/rust-cuda-rockylinux9-cuda12:latest"
-            runner: ubuntu-latest
     steps:
       - name: Compute artifact name
         id: test_artifact