remove sccache feature

Author: trxcllnt

.devcontainer/nvhpc25.7/devcontainer.json

@@ -34,13 +34,6 @@
     "source=${localWorkspaceFolder}/.cache/.config,target=/home/coder/.config,type=bind,consistency=consistent"
   ],
 
-  "features": {
-    "ghcr.io/rapidsai/devcontainers/features/sccache:25.10": {
-      "version": "0.10.0-rapids.48",
-      "repository": "rapidsai/sccache"
-    }
-  },
-
   "customizations": {
     "vscode": {
       "extensions": [