Remove support for the MNG file format and the bundled libmng

The MNG file format is generally abandoned, and libmng has been
unmaintained for several years.

The MNG plugin and bundled libmng has been moved to the
qtimageformats project on Gerrit.

Task-number: QTBUG-21869
Change-Id: I946432347014ffde2b72307a5f8b166ca5553602
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

1 files changed, 0 insertions, 95 deletions

diff --git a/src/3rdparty/libmng/README.contrib b/src/3rdparty/libmng/README.contrib
deleted file mode 100644
index 9b287532a4..0000000000
--- a/src/3rdparty/libmng/README.contrib
+++ /dev/null
@@ -1,95 +0,0 @@
-The contrib directory contains contributions made by fellow
-enthousiasts. (Check respective web-sites for the latest version)
-
-----------------------------------------------------------------------
-
-mngplg - A Netscape plugin for MNG - by Jason Summers
-
-http://pobox.com/~jason1/imaging/mngplg/
-
-The very first contribution, and what a start!
-GIF look out, MNG is on the prowl and ready to swat you like a fly!
-
-----------------------------------------------------------------------
-
-mngplay - An SDL based MNG viewer - by Ralph Giles
-
-http://snow.ashlu.bc.ca/~giles/mng/
-
-Another nice contribution. View MNG files on practically any platform
-with this standalone viewer.
-Source-code only; Requires SDL library and libmng.so
-
-(Modified by Greg Roelofs)
-
-----------------------------------------------------------------------
-
-mngview - A BCB port of the Delphi sample - by Andy Protano
-
-I have added this nice little port to the BCB samples directory.
-It adds a nifty progressbar while reading a file. Excellent work!
-Requires libmng.dll
-(note: this is in the BCB samples directory)
-
-----------------------------------------------------------------------
-
-mngdump - A BCB GUI-based dump utility - by Andy Protano
-
-Andy has sent me this fully functional MNG dump utility, that gives
-detailed information of the contents of any MNG file.
-Requires libmng.dll
-
-----------------------------------------------------------------------
-
-mng-view - A GTK-based MNG viewer - by Vova Babin
-
-Vova has been hacking away with the libmng code and has come up with
-this nice little sample how to write a MNG viewer using GTK.
-Thanks mate!
-Source-code only
-Requires GTK+ (1.2 or higher) and libmng (0.9.2 or higher)
-
-(Modified by Greg Roelofs)
-
-----------------------------------------------------------------------
-
-mngview - Another MNG viewer; this one for MSVC - by Nicholaus Brennig
-
-A welcome contribution from Nicholaus. Author of SlowView. A very nice
-image-handling utility for Windows. A welcome contribution since there
-have been numerous questions about linking libmng with MSVC.
-Well, look no further. Here it is!
-
-----------------------------------------------------------------------
-
-MSVC libmng project - An MSVC project to build libmng.dll
-                    - by Chad Austin
-
-Chad has contributed some project-files that you could use to build
-libmng.dll with MSVC. Please be sure to read the README file included.
-
-----------------------------------------------------------------------
-
-fbmngplay - A simple fbcon based mng player - by Stefan Reinauer
-
-Stefan has contributed this little example, based on Ralph's
-SDL player. It uses the kernel framebuffer device to display mng
-animations through the libmng interface.
-(currently for 16-bit buffers only)
-
-----------------------------------------------------------------------
-
-xmngview - Lesstif/Motif standalone player for MNG files
-         - by Winfried Szukalski
-
-Winfried contributed this MNG player for X-based systems.
-(recently updated)
-
-----------------------------------------------------------------------
-
-makemng - A delta-MNG creation utility for MSVC - by Alex Volkov
-
-Alex sent me this nice utility that will allow you to create highly
-optmized MNGs using the delta-PNG capabilities of MNG.
-
-----------------------------------------------------------------------