modules: camera: remove unused variable

Change-Id: Ic21cd58a750411167ef4b060e8d3abc295edc83d
diff --git a/modules/camera/CameraHAL.cpp b/modules/camera/CameraHAL.cpp
index 6cae7d2..05b1fad 100644
--- a/modules/camera/CameraHAL.cpp
+++ b/modules/camera/CameraHAL.cpp
@@ -90,7 +90,6 @@
 {
     int id;
     char *nameEnd;
-    Camera *cam;
 
     ALOGV("%s: module=%p, name=%s, device=%p", __func__, mod, name, dev);
     id = strtol(name, &nameEnd, 10);