tools/device: Remove deprecated line
gsm.mk no longer exist in vendor/cm

Change-Id: I0b6d50b424b3d24065e7287e1a03b64348014817
Signed-off-by: Jackeagle <jackeagle102@gmail.com>
(cherry picked from commit 53c503550bade08efa5874cc73aff70734b59d85)
1 file changed