manifest: remove DeskClock from extras

we no longer build anymore so just to prevent
build breakage because of it

Change-Id: I0cd5cf5bba74da4bc9de54ea7510f90ba1cb8595
diff --git a/omni-extra.xml b/omni-extra.xml
index c759c9f..19006c7 100644
--- a/omni-extra.xml
+++ b/omni-extra.xml
@@ -2,7 +2,6 @@
 <manifest>
   <project path="packages/apps/Gallery2" name="android_packages_apps_Gallery2" remote="omnirom" revision="android-11" />
   <project path="packages/apps/Calendar" name="android_packages_apps_Calendar" remote="omnirom" revision="android-11" />
-  <project path="packages/apps/ExactCalculator" name="android_packages_apps_ExactCalculator" remote="omnirom" revision="android-10" />
-  <project path="packages/apps/DeskClock" name="android_packages_apps_DeskClock" remote="omnirom" revision="android-10" />
-  <project path="packages/apps/Phonograph" name="android_packages_apps_Phonograph" remote="omnirom" revision="android-10" />
+  <project path="packages/apps/ExactCalculator" name="android_packages_apps_ExactCalculator" remote="omnirom" revision="android-11" />
+  <project path="packages/apps/Phonograph" name="android_packages_apps_Phonograph" remote="omnirom" revision="android-11" />
 </manifest>