configure: drop unnecessary check and define

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>
Reviewed-by: Jan Friesse <jfriesse@redhat.com>

configure.ac

@@ -76,13 +76,6 @@ case $exec_prefix in
   prefix) exec_prefix=$prefix;;
 esac
 
-if test "$srcdir" = "."; then
-	AC_MSG_NOTICE([building in place srcdir:$srcdir])
-	AC_DEFINE([BUILDING_IN_PLACE], 1, [building in place])
-else
-	AC_MSG_NOTICE([building out of tree srcdir:$srcdir])
-fi
-
 # Checks for programs.
 
 # check stolen from gnulib/m4/gnu-make.m4