[devhelp] build: don't use PKG_PROG_PKG_CONFIG

[Sébastien Wilmet <swilmet src gnome org>]

commit ec3b6543393d50b50c131a97447fd341c1d7c47d
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Thu Nov 10 16:28:29 2016 -0600

    build: don't use PKG_PROG_PKG_CONFIG
    
    The first use of PKG_CHECK_MODULES is unconditional and we don't call it
    manually anywhere, so it's useless to call PKG_PROG_PKG_CONFIG.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=774069

 configure.ac |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 2cc79b2..6c3b21b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -39,8 +39,6 @@ LT_INIT([disable-static])
 
 GLIB_GSETTINGS
 
-PKG_PROG_PKG_CONFIG
-
 GOBJECT_INTROSPECTION_CHECK([1.30.0])
 
 GNOME_COMPILE_WARNINGS([maximum])