Remove cuda in ubuntu-24.04-arm

Author: sylvestre

.github/workflows/ci.yml

@@ -98,10 +98,6 @@ jobs:
             rustc: "1.75.0"
             extra_desc: cuda12.6
           - os: ubuntu-24.04-arm
-            cuda: "12.6"
-            # Oldest supported version, keep in sync with README.md
-            rustc: "1.75.0"
-            extra_desc: cuda12.6
           - os: macos-13
           # # M1 CPU
           - os: macos-14