README: remove screenshots

UIs are changing and keeping screenshots actual would waste space
in the repository. Wiki is a better place to place them.

Author: pasis

README.md

@@ -3,8 +3,6 @@ xmppconsole
 
 xmppconsole is a tool for XMPP hackers.
 
-![](screenshot.png)
-
 This tool sends raw XMPP stanzas over an XMPP connection and displays the XMPP
 stream. Main purpose is to study XEPs and debug implementation of XMPP entities.
 
@@ -26,11 +24,8 @@ Or you can even start working with XMPP connection before authentication and
 debug in-band registration or authentication mechanisms.
 
 By default, xmppconsole detects whether it can run with graphical interface and
-falls back to a text interface otherwise:
-
-![](screenshot-ncurses.jpg)
-
-However, you can set preferable UI manually with `-u` option.
+falls back to a text interface otherwise. However, you can set preferable UI
+manually with `-u` option.
 
 Build requirements
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