INetProtocol removals

[Stephan Bergmann]

Over time, we have removed a handful of URI schemes from the 
INetProtocol enum in tools/urlobj.hxx.  A consequence of each removal is 
that e.g. automatic detection of URIs of that scheme in running text no 
longer works.  (As the detection mechanism requires (a) the URI's scheme 
to be among the INetProtocol enum values, except for the catch-all 
INetProtocol::Generic, and (b) the URI to match INetURLObject's idea of 
the syntactic structure for the given scheme.)

The schemes we have removed are the four OOo/LO-private ones

   out
   pop3
   vim
   vnd.sun.star.odma

and the two IANA-registered ones

   imap
   news

So it could be argued that removing the latter two constitutes a 
regression, in that imap and news URLs are no longer auto-detected in 
running text.  But then again, lots of the other IANA-registered URI 
schemes are not, either, so I wouldn't really bother.