Bug 454449. Backout bustage introduced in rev c966e7e41dbd

client.mk

@@ -93,10 +93,6 @@ endif
 # MacOS X 10.4 sends "no autoconf*" errors to stdout, discard those via grep
 AUTOCONF ?= $(shell which autoconf-2.13 autoconf2.13 autoconf213 2>/dev/null | grep -v '^no autoconf' | head -1)
 
-ifeq (,$(strip $(AUTOCONF)))
-$(error Couldn't find autoconf 2.13)
-endif
-
 MKDIR := mkdir
 SH := /bin/sh
 ifndef MAKE