drm: unused argument warning messages

Change-Id: Ifd8a470ffa02f986427c5f36380d70494efe864d
diff --git a/drm/drmserver/DrmManager.cpp b/drm/drmserver/DrmManager.cpp
index d8aeb0c..7c53fea 100644
--- a/drm/drmserver/DrmManager.cpp
+++ b/drm/drmserver/DrmManager.cpp
@@ -370,7 +370,7 @@
 }
 
 status_t DrmManager::getAllSupportInfo(
-                    int uniqueId, int* length, DrmSupportInfo** drmSupportInfoArray) {
+                    int /*uniqueId*/, int* length, DrmSupportInfo** drmSupportInfoArray) {
     Mutex::Autolock _l(mLock);
     Vector<String8> plugInPathList = mPlugInManager.getPlugInIdList();
     int size = plugInPathList.size();