build: drop commented out line

Drop commented out line to use libmapper.

Change-Id: Iaefcd8f1c0dc985f421f9df21ade545da88e807c
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/configure.ac b/configure.ac
index 9582613..a28a999 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,7 +21,6 @@
 AX_APPEND_COMPILE_FLAGS([-fpic -Wall -Werror], [CXXFLAGS])
 
 # Checks for libraries.
-# AC_CHECK_LIB([mapper], [mapper_get_service], ,[AC_MSG_ERROR([Could not find libmapper...openbmc/phosphor-objmgr package required])])
 PKG_CHECK_MODULES([SYSTEMD], [libsystemd >= 221], [], [AC_MSG_ERROR(["systemd required and not found"])])
 PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus], ,[AC_MSG_ERROR([The openbmc/sdbusplus package is required])])
 PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging], ,[AC_MSG_ERROR([The openbmc/phosphor-logging package is required])])