Revert "Force our umount w/in the chroot."

This change breaks the chromiumos_sdk builder.  See

http://uberchromegw.corp.google.com/i/chromiumos/builders/chromiumos%20sdk/builds/2314/steps/BuildBoard/logs/stdio

This reverts commit 23da619f138d0b4ca148c3940ec8c4ff0827e396

Change-Id: I47aa6e94aa0c62494cc40e9964f25097d3353322
Reviewed-on: https://gerrit.chromium.org/gerrit/32349
Reviewed-by: Chris Sosa <sosa@chromium.org>
Tested-by: Chris Sosa <sosa@chromium.org>
diff --git a/sdk_lib/enter_chroot.sh b/sdk_lib/enter_chroot.sh
index 58cb0f5..77a25d4 100755
--- a/sdk_lib/enter_chroot.sh
+++ b/sdk_lib/enter_chroot.sh
@@ -274,13 +274,9 @@
         queue_mount /run/shm "--bind" /run/shm
       fi
     fi
-    # Get path overrides for the chroot in place now- it's possible
-    # that they may be needed for early teardown.
-    queue_mount "${FLAGS_trunk}/src/scripts/path-overrides" "--bind" \
-      "/usr/local/path-overrides"
-
     queue_mount "${FLAGS_trunk}" "--bind" "${CHROOT_TRUNK_DIR}"
 
+
     debug "Setting up referenced repositories if required."
     REFERENCE_DIR=$(git config --file  \
       "${FLAGS_trunk}/.repo/manifests.git/config" \