Bug#907078: libwebkit2gtk-4.0-37-gtk2: Drop this package?

[Jeremy Bicha]

Package: libwebkit2gtk-4.0-37-gtk2
Version: 2.21.91-2

libwebkit2gtk-4.0-37-gtk2 has only one reverse dependency in Debian:
epiphany-browser recommends it. epiphany-browser 3.29 no longer
supports NPAPI plugins. Since epiphany 3.30 will be released around
the same time as webkit 2.22, I propose we drop the -gtk2 package now
in the 2.21 (experimental) series.

Adobe Flash will no longer be supported after the end of 2020, which
is before Debian Buster will go out of support.

I guess we'll want to keep the -gtk2 package for Debian Stretch for
now since we have an older epiphany version there.

I took a quick look and see a ENABLE_PLUGIN_PROCESS_GTK2 option in
Source/WebCore/PlatformGTK.cmake but I haven't tested this.

References
----------------
https://mail.gnome.org/archives/epiphany-list/2018-March/msg00002.html

Thanks,
Jeremy Bicha