manifest: remove platform/development from remove list

Change-Id: Id4689bf299dfd0d8e852e0809e1702968f3d4b37

remove.xml

@@ -8,8 +8,6 @@
   <remove-project name="platform/developers/demos" />
   <remove-project name="platform/developers/samples/android" />
 
-  <remove-project name="platform/development" />
-
   <remove-project name="platform/docs/source.android.com" />
 
   <remove-project name="device/asus/fugu" />