(rmv dead -I paths for mktables + rmv copying non-existant path) on Win32

(rmv dead -I paths for mktables + rmv copying non-existant path) on Win32

Introduced in commit f54fcafc49 in 5.11.2 , the -I paths are dead since
commit cb8c84586a in 5.19.6 that renamed dist/Cwd to dist/PathTools . Since
the paths have been invalid for so long with no complaints so remove them.
That -I probably isn't needed anymore because Cwd AKA PathTools have been
in write_buildcustomize.pl since day 1 of write_buildcustomize.pl in
commit 5e4c4c91bd from 5.13.10 .

The makefile line says to copy to /lib the directory win32/lib. win32/lib
has never existed in Perl. There was a win32/ext from commit b4ad57f4f7 in
5.9.2 to commit 78ff2d7be7 in 5.9.5 but not win32/lib. The useless
makefile rule is from day 1 of makefile.mk in commit 08aa1457cd in 5.004001
which was copied from the win32/Makefile, at the time of commit 08aa1457cd.
win32/Makefile got the win32/lib copy line from day 1 of win32/Makefile in
commit 0a753a7640 , and there was no /win32/lib when /win32 was commited.