chore(windows): remove deprecated switches from kmshell command line code.

The following switches are no longer valid and should be removed along with the associated dead code. If some of these switches are still needed then their operation needs to be updated work with the current code base. -kp for example I think partially works.

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switch | Description
-- | --
-? | Does nothing
-kp | Prints the onscreen keyboard for the keyboard file supplied as the first argument -kw bj_cree_east
-showhint | Internal from KeymanEngine (doesn’t work for me)
-v | Now longer used?
-ur | UnRegCRC no idea
-u | No longer used
-repair | Currently disabled
-rr | No longer used
-ra | No longer used
-log filename | Used inconjunciton with -i doesn’t work
-m | Migrate does nothing
-startwithconfiguration | Loads the Keyman configuration UI maybe only if splash is enabled doesn’t seem to work