deleted file mode 100755
--- a/build/print_mk_add_options.sh
+++ /dev/null
@@ -1,14 +0,0 @@
-#!/bin/sh
-
-ac_add_options() {
-  return
-}
-
-mk_add_options() {
-  echo "mk_add_options:" "$@"
-}
-
-MOZCONFIG=${MOZCONFIG:-./.mozconfig}
-topsrcdir=${topsrcdir:-$PWD}
-
-source $MOZCONFIG

deleted file mode 100644
--- a/build/run_client.py
+++ /dev/null
@@ -1,48 +0,0 @@
-#!/usr/bin/env python
-
-import sys
-import os.path
-import re
-from subprocess import Popen, PIPE
-import shlex
-
-topsrcdir = sys.argv[1]
-
-run = False
-
-if len(sys.argv) >= 3:
-    run = True
-
-client_py_args = []
-
-options_re = re.compile('^mk_add_options:\s+CLIENT_PY_ARGS\s*=\s*(.*)$')
-always_run_re = re.compile('^mk_add_options:\s+ALWAYS_RUN_CLIENT_PY\s*=\s*(.*)$')
-
-process = Popen(['build/print_mk_add_options.sh'], stdout=PIPE, stderr=sys.stderr)
-output, unused_err = process.communicate()
-
-for line in output.splitlines():
-    found_opt = options_re.match(line)
-    if found_opt:
-        client_py_args = found_opt.group(1)
-
-    found_always = always_run_re.match(line)
-    if found_always:
-        val = found_always.group(1)
-        if val != "0":
-            run = True
-
-if run:
-    if not client_py_args:
-        print >> sys.stderr, "Can't run client.py without some CLIENT_PY_ARGS in mozconfig"
-        sys.exit(1)
-    cmd = [sys.executable, 'client.py' ] + shlex.split(client_py_args)
-    print >> sys.stderr, "Running: %s" % cmd
-    # Run the command and redirect output to stderr so make will display it
-    p = Popen(cmd,
-        stdout=sys.stderr,
-        stderr=sys.stderr,
-    )
-    p.wait()
-    print >> sys.stderr, "%s returned %s" % (cmd, p.returncode)
-    sys.exit(p.returncode)

--- a/client.mk
+++ b/client.mk
@@ -131,27 +131,16 @@ endif
 # Load mozconfig Options
 
 # See build pages, http://www.mozilla.org/build/ for how to set up mozconfig.
 
 MOZCONFIG_LOADER := mozilla/build/autoconf/mozconfig2client-mk
 MOZCONFIG_FINDER := mozilla/build/autoconf/mozconfig-find
 MOZCONFIG_MODULES := mozilla/build/unix/uniq.pl
 
-# We need to give client.py an early chance to run, since we don't necessarely
-# have a mozilla/ checkout yet
-run_for_side_effects := \
-  @if test ! -f .client.run; then \
-    $(shell $(PYTHON) $(TOPSRCDIR)/build/run_client.py $(TOPSRCDIR) > .client.out ); \
-    touch .client.run \
-  else \
-    rm -f .client.run; \
-    true; \
-  fi
-
 run_for_side_effects := \
   $(shell $(TOPSRCDIR)/$(MOZCONFIG_LOADER) $(TOPSRCDIR) $(TOPSRCDIR)/.mozconfig.mk > $(TOPSRCDIR)/.mozconfig.out)
 
 include $(TOPSRCDIR)/.mozconfig.mk
 
 ifndef MOZ_OBJDIR
   MOZ_OBJDIR = obj-$(CONFIG_GUESS)
 endif
@@ -410,21 +399,17 @@ cleansrcdir:
 	else \
 	  echo "Removing object files from srcdir..."; \
 	  rm -fr `find . -type d \( -name .deps -print -o -name CVS \
 	          -o -exec test ! -d {}/CVS \; \) -prune \
 	          -o \( -name '*.[ao]' -o -name '*.so' \) -type f -print`; \
 	   build/autoconf/clean-config.sh; \
 	fi;
 
-checkout co:
-	@$(PYTHON) $(TOPSRCDIR)/build/run_client.py $(TOPSRCDIR) force
-
-
 echo-variable-%:
 	@echo $($*)
 
 # This makefile doesn't support parallel execution. It does pass
 # MOZ_MAKE_FLAGS to sub-make processes, so they will correctly execute
 # in parallel.
 .NOTPARALLEL:
 
-.PHONY: checkout co real_checkout depend build profiledbuild maybe_clobber_profiledbuild export libs alldep install clean realclean distclean cleansrcdir pull_all build_all clobber clobber_all pull_and_build_all everything configure preflight_all preflight postflight postflight_all
+.PHONY: checkout real_checkout depend build profiledbuild maybe_clobber_profiledbuild export libs alldep install clean realclean distclean cleansrcdir pull_all build_all clobber clobber_all pull_and_build_all everything configure preflight_all preflight postflight postflight_all