Debugger: Remove dumper debugging output

Change-Id: I0dc23dd5d69885f8ddeb933ae644a983406bbb05
Reviewed-by: Jarek Kobus <jaroslaw.kobus@digia.com>

share/qtcreator/debugger/gdbbridge.py

@@ -1793,10 +1793,8 @@ registerCommand("pp", pp)
 
 # Global instance.
 if gdb.parameter('height') is None:
-    print("Using MI")
     theDumper = Dumper()
 else:
-    print("Using CLI")
     import codecs
     theDumper = CliDumper()