And another cleanups like removing RTL_CONST* macros and other simple
things.

Much more can be done inside codemaker.

Change-Id: I338e1c0e88558124741c6202896355533535a129
Reviewed-on: https://gerrit.libreoffice.org/2583Reviewed-by: Thomas Arnhold <thomas@arnhold.org>
Reviewed-by: Fridrich Strba <fridrich@documentfoundation.org>
Tested-by: Fridrich Strba <fridrich@documentfoundation.org>