Remove links in plugin about dialogs

They're all maintained as part of the Xed project, which link is already
present in the main help about dialog.

debian/copyright

@@ -1,7 +1,7 @@
 Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
-Upstream-Name: xed (old name: mate-text-editor)
+Upstream-Name: xed
-Upstream-Contact: Stefano Karapetsas <stefano@karapetsas.com>
+Upstream-Contact: Linux Mint <root@linuxmint.com>
-Source: http://git.mate-desktop.org/xed/
+Source: http://github.com/linuxmint/xed/
 
 Files: plugins/docinfo/xed-docinfo-plugin.c
        plugins/docinfo/xed-docinfo-plugin.h

plugins/bracket-complete/bracket-complete/bracketcompletion.plugin

@@ -102,5 +102,4 @@ Description[zh_TW]=自動加入關閉用括號。
 Description=Automatically adds closing brackets.
 Authors=Hrutvik Suthar <steve@istique.net>
 Copyright=Copyright @ 2020 Hrutvik Suthar
-Website=https://github.com/HrSuthar/xed
 Version=1.0

plugins/filebrowser/filebrowser.plugin.desktop.in

@@ -7,4 +7,3 @@ _Description=Easy file access from the side pane
 Icon=system-file-manager
 Authors=Jesse van den Kieboom <jesse@icecrew.nl>
 Copyright=Copyright © 2006 Jesse van den Kieboom
-Website=http://www.mate-desktop.org

plugins/joinlines/joinlines.plugin.desktop.in

@@ -7,6 +7,4 @@ _Description=Join several lines
 Icon=gnome-mime-text-x-python
 Authors=Steve Frécinaux <steve@istique.net>;André Homeyer;Linux Mint team
 Copyright=Copyright @ 2006-2007 Steve Frécinaux, André Homeyer
-Website=https://github.com/linuxmint
 Builtin=true
-

plugins/modelines/modelines.plugin.desktop.in

@@ -5,4 +5,3 @@ _Name=Modelines
 _Description=Emacs, Kate and Vim-style modelines support for xed.
 Authors=Steve Frécinaux <steve@istique.net>
 Copyright=Copyright © 2005 Steve Frécinaux
-Website=http://www.mate-desktop.org

plugins/open-uri-context-menu/open-uri-context-menu/open-uri-context-menu.plugin

@@ -7,5 +7,4 @@ Description=Adds context menu item to open an URI at the pointer position.
 Icon=gtk-open
 Authors=Martin Szulecki <opensuse@sukimashita.com>\nJean-Philippe Fleury <contact@jpfleury.net>
 Copyright=Copyright © 2007-2008 Martin Szulecki\nCopyright © 2011 Jean-Philippe Fleury
-Website=https://github.com/jpfleury/open-uri-context-menu
 Builtin=true

plugins/sort/sort.plugin.desktop.in

@@ -6,5 +6,4 @@ _Description=Sorts a document or selected text.
 Icon=gtk-sort-ascending
 Authors=Carlo Borreo <borreo@softhome.net>;Lee Mallabone <mate@fonicmonkey.net>;Paolo Maggi <paolo.maggi@polito.it>;Jorge Alberto Torres H. <jorge@deadoak.com>
 Copyright=Copyright © 2001 Carlo Borreo\nCopyright © 2002-2003 Lee Mallabone, Paolo Maggi\nCopyright © 2004-2005 Paolo Maggi
-Website=http://www.mate-desktop.org
 Builtin=true

plugins/spell/spell.plugin.desktop.in

@@ -6,4 +6,3 @@ _Description=Checks the spelling of the current document.
 Icon=gtk-spell-check
 Authors=Paolo Maggi <paolo@gnome.org>
 Copyright=Copyright © 2002-2005 Paolo Maggi
-Website=http://www.mate-desktop.org

plugins/taglist/taglist.plugin.desktop.in

@@ -5,4 +5,3 @@ _Name=Tag list
 _Description=Provides a method to easily insert commonly used tags/strings into a document without having to type them.
 Authors=Paolo Maggi <paolo.maggi@polito.it>
 Copyright=Copyright © 2002-2005 Paolo Maggi
-Website=http://www.mate-desktop.org

plugins/textsize/textsize.plugin.desktop.in

@@ -7,5 +7,4 @@ _Description=Allow controlling the zoom levels of the text
 Icon=gnome-mime-text-x-python
 Authors=Steve Frécinaux <steve@istique.net>;Linux Mint team
 Copyright=Copyright © 2017 by the authors
-Website=https://github.com/linuxmint
 Builtin=true

plugins/time/time.plugin.desktop.in

@@ -5,4 +5,3 @@ _Name=Insert Date/Time
 _Description=Inserts current date and time at the cursor position.
 Authors=Paolo Maggi <paolo.maggi@polito.it>;Lee Mallabone <mate@fonicmonkey.net>
 Copyright=Copyright © 2002-2005 Paolo Maggi
-Website=http://www.mate-desktop.org

plugins/trailsave/trailsave.plugin.desktop.in

@@ -6,4 +6,3 @@ _Description=Removes trailing spaces from lines before saving.
 Icon=gtk-cut
 Authors=Marty Mills <daggerbot@gmail.com>
 Copyright=Copyright © 2015 Marty Mills
-Website=http://www.mate-desktop.org

plugins/wordcompletion/wordcompletion.plugin

@@ -29,5 +29,4 @@ Name[zh_CN]=单词补全
 Description=Predicts the rest of the word after a few characters have been typed.
 Authors=Jesse van den Kieboom <jesse@gnome.org>\nIgnacio Casal Quinteiro <icq@gnome.org>\nMickael Albertus <mickael.albertus@gmail.com>
 Copyright=Copyright © 2017 Mickael Albertus\n2009 Jesse van den Kieboom
-Website=https://github.com/linuxmint/xed
 Version=@VERSION@

plugins/wordcompletion/wordcompletion.plugin.desktop.in

@@ -5,5 +5,4 @@ _Name=Word Completion
 _Description=Predicts the rest of the word after a few characters have been typed.
 Authors=Jesse van den Kieboom <jesse@gnome.org>\nIgnacio Casal Quinteiro <icq@gnome.org>\nMickael Albertus <mickael.albertus@gmail.com>
 Copyright=Copyright © 2017 Mickael Albertus\n2009 Jesse van den Kieboom
-Website=https://github.com/linuxmint/xed
 Version=@VERSION@

tools/plugin_template/xed-plugin.desktop.in

@@ -6,4 +6,3 @@ _Description=##(DESCRIPTION)
 Icon=xed-plugin
 Authors=##(AUTHOR_FULLNAME) <##(AUTHOR_EMAIL.lower)>
 Copyright=Copyright © ##(DATE_YEAR) ##(AUTHOR_FULLNAME)
-Website=http://www.mate-desktop.org