manifest: switch to our libdrm

Change-Id: I268aa07afb764d83ce34503365cf71e4e9131472
diff --git a/remove.xml b/remove.xml
index 6fa818d..c06150b 100644
--- a/remove.xml
+++ b/remove.xml
@@ -8,6 +8,7 @@
 
     <remove-project name="platform/external/drm_hwcomposer" />
     <remove-project name="platform/external/chromium-webview" />
+    <remove-project name="platform/external/libdrm" />
 
     <remove-project name="platform/frameworks/av" />
     <remove-project name="platform/frameworks/base" />