Remove GRPC_GENERATED from ccaosdb

Linking against caosdb should achieve the same.

CMakeLists.txt

@@ -178,12 +178,9 @@ target_include_directories(caosdb PUBLIC
     $<INSTALL_INTERFACE:include>
 )
 
-
-
-
 # libccaosdb
 # ----------
-add_library(ccaosdb SHARED src/ccaosdb.cpp ${GRPC_GENERATED})
+add_library(ccaosdb SHARED src/ccaosdb.cpp)
 target_link_libraries(ccaosdb
     gRPC::grpc gRPC::grpc++ protobuf::libprotobuf ${Boost_LIBRARIES}
     ${LIBCAOSDB}