[ekiga] SIP: Removed unused chat stuff.

[Damien Sandras <dsandras src gnome org>]

commit a855ed18bbb2596a62ac21b0f5d566b0f7056d31
Author: Damien Sandras <dsandras seconix com>
Date:   Sat Jun 20 13:27:32 2015 +0200

    SIP: Removed unused chat stuff.
    
    This will be reimplemented and rethinked from scratch. We can restore
    those files or parts of them at any time if they are required.
    
    But for now, better simplify things.

 lib/engine/components/opal/sip-conversation.cpp |   91 -------------------
 lib/engine/components/opal/sip-conversation.h   |   97 ---------------------
 lib/engine/components/opal/sip-dialect.cpp      |  106 -----------------------
 lib/engine/components/opal/sip-dialect.h        |   76 ----------------
 lib/engine/components/opal/sip-heap.cpp         |   64 --------------
 lib/engine/components/opal/sip-heap.h           |   57 ------------
 6 files changed, 0 insertions(+), 491 deletions(-)