diff --git a/cros_mark_branch_as_stable b/cros_mark_branch_as_stable
deleted file mode 100755
index e538235419..0000000000
--- a/cros_mark_branch_as_stable
+++ /dev/null
@@ -1,115 +0,0 @@
-#!/bin/bash
-
-# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-# Mark all ebuilds in chromiumos-overlay and chromeos-overlay as stable and
-# point them at the current version we have checked out.
-#
-# This is useful in case we want to verify that all ebuilds are pointing at the
-# right commit hash when we are doing a build on a branch. It is intended to be
-# used prior to tagging and can be used instead of a preflight queue. It is an
-# alternative to cros_mark_all_as_stable that does not require a chroot and
-# does not increase the revision number on ebuilds.
-#
-# Unlike cros_mark_all_as_stable, which only updates the latest stable ebuild
-# for a given board, this script updates all stable ebuilds for all boards,
-# including unused stable ebuilds. We do this for the sake of simplicity
-# because it's hard to know in advance which ebuilds are truly unused, and it
-# shouldn't hurt to update unused ebuilds.
-#
-# This script does not support cros_mark_as_stable_blacklist. If there are any
-# packages in the blacklist, this script exits with an error message.
-#
-# Long term, the plan is to get rid of this script and replace it with
-# cros_mark_all_as_stable. This script is only present to help with branching.
-#
-# Example usage: ./cros_mark_branch_as_stable
-
-# --- BEGIN COMMON.SH BOILERPLATE ---
-# Load common CrOS utilities.  Inside the chroot this file is installed in
-# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
-# location.
-find_common_sh() {
-  local common_paths=(/usr/lib/crosutils $(dirname "$(readlink -f "$0")"))
-  local path
-
-  SCRIPT_ROOT=
-  for path in "${common_paths[@]}"; do
-    if [ -r "${path}/common.sh" ]; then
-      SCRIPT_ROOT=${path}
-      break
-    fi
-  done
-}
-
-find_common_sh
-. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
-# --- END COMMON.SH BOILERPLATE ---
-
-function is_workon() { xargs grep -lE '^inherit.*cros-workon'; }
-function is_stable() { xargs grep -lE '^KEYWORDS=[^~]*$'; }
-function is_unstable() { xargs grep -lE '^KEYWORDS=.*~'; }
-
-function get_workon_commit() {
-  # Get the latest workon commit associated with an ebuild.
-  ebuild="$1"
-  dir=$(dirname "$ebuild")
-  CATEGORY=$(basename "$(dirname "$dir")")
-  CROS_WORKON_LOCALNAME=$(basename "$dir")
-  CROS_WORKON_SUBDIR=
-
-  # Grab the code from the ebuild that initializes the CROS_WORKON_*
-  # variables, and eval it. Note that this only works if the variables are at
-  # the start of the line (i.e. it doesn't work for "if" statements).
-  eval $(grep -E '^CROS_WORKON' $ebuild)
-
-  SUFFIX="$CROS_WORKON_LOCALNAME/$CROS_WORKON_SUBDIR"
-  if [[ "$CATEGORY" = "chromeos-base" ]]; then
-    SRCDIR="$GCLIENT_ROOT/src/platform/$SUFFIX"
-  else
-    SRCDIR="$GCLIENT_ROOT/src/third_party/$SUFFIX"
-  fi
-
-  # TODO(anush): This hack is only necessary because the kernel ebuild has "if"
-  # statements, so we can't grab the CROS_WORKON_LOCALNAME properly. We should
-  # clean up the kernel ebuild and remove this hack.
-  if ! [[ -d "$SRCDIR" ]] && [[ "$CROS_WORKON_LOCALNAME" = "kernel" ]]; then
-    SRCDIR="$GCLIENT_ROOT/src/third_party/kernel/files"
-  fi
-
-  cd $SRCDIR && git rev-parse HEAD
-}
-
-BLACKLIST_FILE="${SCRIPTS_DIR}/cros_mark_as_stable_blacklist"
-BLACKLIST=$(cat "$BLACKLIST_FILE")
-if [[ -n "$BLACKLIST" ]]; then
-  die "$0 does not support cros_mark_as_stable_blacklist"
-fi
-
-for overlay in "$GCLIENT_ROOT/src/private-overlays/chromeos-overlay" \
-               "$GCLIENT_ROOT/src/third_party/chromiumos-overlay"; do
-  if [[ -d "$overlay" ]]; then
-    ebuilds=$(find "$overlay" -type f -name "*.ebuild" | is_workon | is_stable)
-    for ebuild in $ebuilds; do
-      dir=$(dirname "$ebuild")
-      unstable_ebuild=$(echo "$dir"/*-9999.ebuild | is_workon | is_unstable)
-      if [[ -f "$unstable_ebuild" ]]; then
-        COMMIT=$(get_workon_commit $unstable_ebuild)
-        sed -e '/^KEYWORDS="/s/~//g' -e '/^CROS_WORKON_COMMIT=/d' \
-            -e "/^EAPI/s/\$/\nCROS_WORKON_COMMIT=\"$COMMIT\"/g" \
-          "$unstable_ebuild" > "$ebuild"
-      else
-        echo "No 9999 ebuild for $ebuild" >&2
-        COMMIT=$(get_workon_commit $ebuild)
-        sed -i -e "/^CROS_WORKON_COMMIT/s|=.*|=\"$COMMIT\"|" "$ebuild"
-      fi
-      if [[ -z "$COMMIT" ]]; then
-        die "No commit hash for $ebuild"
-      fi
-    done
-  fi
-done
-
-echo Updated all ebuilds