[evolution] Drop KRB5 dependency

[Milan Crha <mcrha src gnome org>]

commit 6f457a37e8b41c6dcbf702805ea87c594dc6e050
Author: Milan Crha <mcrha redhat com>
Date:   Fri Jan 17 08:53:25 2014 +0100

    Drop KRB5 dependency
    
    It turned out that evolution itself doesn't use KRB5 directly,
    thus the dependency is useless and can be dropped.

 configure.ac           |    5 --
 m4/evo_krb5_support.m4 |  136 ------------------------------------------------
 2 files changed, 0 insertions(+), 141 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index bf23f0c..5e116ca 100644
--- a/configure.ac
+++ b/configure.ac
@@ -586,11 +586,6 @@ PKG_CHECK_MODULES([GTKHTML],
 AC_SUBST(GTKHTML_CFLAGS)
 AC_SUBST(GTKHTML_LIBS)
 
-dnl ************
-dnl Kerberos 5
-dnl ************
-EVO_KRB5_SUPPORT(no)
-
 dnl ********************************************************************************
 dnl security extension support (SSL and S/MIME)
 dnl