tmf: remove setting of anti-aliasing in histogram

tmf: remove setting of anti-aliasing in histogram

The setting of anti-aliasing in histogram paintContro() is triggering
another redraw of the histogram. This endless redraw will make
the UI unresponsive. It seems only to happen on some Linux versions.
Until we figured-out the root cause it's better to remove the setting
of anti-aliasing.

Change-Id: I38b6f5062869a4ecaa32ad03d9883736d9475cec
Signed-off-by: Bernd Hufmann <Bernd.Hufmann@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/20006
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
IP-Clean: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>
IP-Clean: Patrick Tasse <patrick.tasse@gmail.com>
Tested-by: Hudson CI