init.rc: don't mount debugfs

We'll do this in the product-specific init files.
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 8d1aff4..d502628 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -164,8 +164,6 @@
     setprop ro.CONTENT_PROVIDER_MEM 5632
     setprop ro.EMPTY_APP_MEM 6144
 
-    mount debugfs /sys/kernel/debug /sys/kernel/debug
-
 # Write value must be consistent with the above properties.
 # Note that the driver only supports 6 slots, so we have HOME_APP at the
 # same memory level as services.