Remove ucannode_gps_demo since it's superseded by uavcan_v1

Author: PetervdPerk-NXP

.gitmodules

@@ -42,12 +42,6 @@
 [submodule "src/drivers/uavcan_v1/public_regulated_data_types"]
 	path = src/drivers/uavcan_v1/public_regulated_data_types
 	url = https://github.com/UAVCAN/public_regulated_data_types.git
-[submodule "src/drivers/uavcannode_gps_demo/public_regulated_data_types"]
-	path = src/drivers/uavcannode_gps_demo/public_regulated_data_types
-	url = https://github.com/UAVCAN/public_regulated_data_types.git
-[submodule "src/drivers/uavcannode_gps_demo/libcanard"]
-	path = src/drivers/uavcannode_gps_demo/libcanard
-	url = https://github.com/UAVCAN/libcanard.git
 [submodule "src/drivers/uavcan_v1/legacy_data_types"]
 	path = src/drivers/uavcan_v1/legacy_data_types
 	url = https://github.com/PX4/public_regulated_data_types.git