Do not compile cpu backend sources when building runtime.
These sources was supposed to be excluded when cpu backend is built
separately but it wasn't yet.
Signed-off-by: Hanjoung Lee <hanjoung.lee@samsung.com>
file(GLOB_RECURSE SOURCES_INTERNAL "src/internal/*.cc")
file(GLOB_RECURSE SOURCES_KERNEL "src/kernel/*.cc") # TODO should be built as a separate lib
-# TODO This must be built separately, just like "backend/cpu"
-file(GLOB_RECURSE SOURCES_BACKEND_ACL "src/backend/acl_cl/*.cc")
-
-set(SOURCES ${SOURCES} ${SOURCES_INTERNAL} ${SOURCES_BACKEND_ACL} ${SOURCES_KERNEL})
+set(SOURCES ${SOURCES} ${SOURCES_INTERNAL} ${SOURCES_KERNEL})
# NOTE For now ARMCompute is necessary
# TODO Remove required package below(should be optional)