disp: msm: remove stale ION references

After adapting dma buf api's these references and
paths are unusable. Clean it up.

Change-Id: Id6fa76945132e312e8bacf6e430633b0db9e48a3
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>

msm/msm_gem_prime.c

@@ -25,8 +25,6 @@
 
 #include <linux/qcom-dma-mapping.h>
 #include <linux/dma-buf.h>
-#include <linux/ion.h>
-#include <linux/msm_ion.h>
 
 struct sg_table *msm_gem_prime_get_sg_table(struct drm_gem_object *obj)
 {