CI: removed old dsdl/ardupilot reference

.github/workflows/test_sitl_periph.yml

@@ -47,7 +47,7 @@ jobs:
       - name: run dronecan dsdlc generator test
         run: |
           PATH="/github/home/.local/bin:$PATH"
-          python modules/DroneCAN/dronecan_dsdlc/dronecan_dsdlc.py -O dsdlc_generated libraries/AP_UAVCAN/dsdl/ardupilot modules/DroneCAN/DSDL/uavcan modules/DroneCAN/DSDL/dronecan modules/DroneCAN/DSDL/com --run-test
+          python modules/DroneCAN/dronecan_dsdlc/dronecan_dsdlc.py -O dsdlc_generated modules/DroneCAN/DSDL/uavcan modules/DroneCAN/DSDL/dronecan modules/DroneCAN/DSDL/com --run-test
 
       - name: build sitl_periph_gps
         shell: bash