Why drop useflag wpg for inkscape

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After last sync I recognized that the wpg Use-flag for inkscape was dropped and therefor the following packages would be installed:

[i92guboj]

media-gfx/inkscape/ChangeLog

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On the homepage (http://wiki.inkscape.org/wiki/index.php/CompilingInkscape) you can read that Inkscape doesn't depend on libwpg, if you want to use this feature you have to install libwpg separately. So, if you have installed libwpg and you emerge USE=-wpg inkscape, wpg functionality will still be available.
That's how I understand it. But I don't need it and I won't install the dependencies.

[Genone]

[165177]

I'd guess, he's referring to the this apparent absence of any references to libwpg

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sorry for the late answer, but I was busy.
As lunar wrote, I think there is no need for libwpg (If you don't need this feature) because it is absence.
The only references I found are one in an ebuild for "Inkscape Subversion on Gentoo Linux" (http://wiki.inkscape.org/wiki/index.php/CompilingGentoo) and one in http://wiki.inkscape.org/wiki/index.php/CompilingUbuntu#Additional_dependencies:

[165177]

"No switch in configure" means, that it is impossible to do "./configure --disable-wpg" (or something like that) to explicitly disable (or enable respectively) the use of libwpg when building inkscape. The build system of inkscape will always automatically determine, whether to use (and thus depend) on libwpg or not, depending on whether libwpg was installed while building inkscape.

This is a such-called "automagic dependency". Tracking such kind of implicit dependencies is nigh impossible, which causes serious problems for source-based distributions like Gentoo. The Gentoo documentation provides a more accurate summary of this topic [1].

[1] http://www.gentoo.org/proj/en/qa/automagic.xml