Revert "Enable "sync -c" default for repo"

Causes weird stuff for me (wrong branches being checked out)

This reverts commit 46f1b441deded34a9af7683f48cd67e9bcae362e.

Change-Id: I7e0ac707267a2bfe35be53022d5753b529c2b016

default.xml

@@ -17,7 +17,6 @@
 
   <default revision="refs/tags/android-4.4_r1"
            remote="aosp"
-           sync-c="true"
            sync-j="4" />
 
   <project path="build" name="android_build" remote="omnirom" revision="android-4.4" groups="pdk" >