gnucash unstable: Remove X11 error handler

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/49c70795 (commit)
	from  https://github.com/Gnucash/gnucash/commit/f05761e6 (commit)



commit 49c70795c39bf75c1999b45d0883fdaf076e1202
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon Oct 30 10:08:07 2017 -0700

    Remove X11 error handler
    
    And with it the only direct X11 dependency.



Summary of changes:
 CMakeLists.txt                        |  4 ----
 common/config.h.cmake.in              |  3 ---
 configure.ac                          | 11 +++--------
 gnucash/gnome-utils/Makefile.am       |  4 ----
 gnucash/gnome-utils/gnc-gnome-utils.c | 29 -----------------------------
 5 files changed, 3 insertions(+), 48 deletions(-)