fixup - don't want vis

Author: ptheywood

.github/workflows/Manylinux_2_28.yml

@@ -50,8 +50,8 @@ jobs:
             config: "Release"
             SEATBELTS: "ON"
         VISUALISATION:
-          - "ON"
-          # - "OFF"
+          # - "ON"
+          - "OFF"
 
     # Name the job based on matrix/env options
     name: "build (${{ matrix.cudacxx.cuda }}, ${{matrix.python}}, ${{ matrix.VISUALISATION }}, ${{ matrix.config.name }}, ${{ matrix.cudacxx.os }})"