tmf: Remove unnecessary global action handlers

tmf: Remove unnecessary global action handlers

These actions were no longer necessary since the menu contributions were
changed to use the global command ids in commit 9625626.

The Delete action is also removed from the context menu when the
selection contains a mix of traces, folders or experiments.

Change-Id: I24a714f3935b09616e8f74e2970ba19981dc143c
Signed-off-by: Patrick Tasse <patrick.tasse@gmail.com>
Signed-off-by: Bernd Hufmann <Bernd.Hufmann@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/25441
Tested-by: Hudson CI
Reviewed-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
Tested-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>