m7spr: remove call to nonexistent overlay

Change-Id: If25228997a806b2d05bdeb3595c7873314f38e46
diff --git a/device.mk b/device.mk
index 2b74341..e05f744 100644
--- a/device.mk
+++ b/device.mk
@@ -20,8 +20,5 @@
 # overlays
 DEVICE_PACKAGE_OVERLAYS += device/htc/m7spr/overlay
 
-# common overlays
-DEVICE_PACKAGE_OVERLAYS += device/htc/m7-common/overlay-cdma
-
 # Inherit from m7-common
 $(call inherit-product, device/htc/m7-common/m7-common.mk)