Fix contiki makefile for removed ojects

Signed-off-by: delme-imgtec <[email protected]>

Author: delmet

core/src/client/Makefile.client

@@ -1,11 +1,7 @@
 client_src = \
   lwm2m_registration.c \
   lwm2m_bootstrap.c \
-  lwm2m_connectivity_object.c \
   lwm2m_security_object.c \
-  lwm2m_device_object.c \
-  lwm2m_location_object.c \
-  lwm2m_firmware_object.c \
   lwm2m_client_core.c \
   lwm2m_acl_object.c \
   lwm2m_server_object.c \