Bug#923975: task files should not recommend removed packages

[Wolfgang Schweer <wschweer@arcor.de>]

Source: tasksel
Version: 3.50
Severity: normal
User: debian-edu@lists.debian.org
Usertags: debian-edu

Dear maintainers,

while working at Debian Edu installation media I noticed that various
tasks are recommending packages that are not (or no longer) available:

task-catalan-desktop:        myspell-ca (see also: #910615)
task-chinese-s:              fortune-zh
task-finnish-desktop:        xul-ext-mozvoikko
task-french:                 doc-linux-fr-text, doc-debian-fr
task-greek-desktop:          fonts-mgopen (see also: #823150)
task-gujarati-kde-desktop:   kde-l10n-gu
task-hungarian-desktop:      libreoffice-thesausus-hu
task-italian-desktop:        myspell-it
task-kannada-kde-desktop:    kde-l10n-kn
task-kurdish-desktop:        libreoffice-l10n-ku, myspell-ku
task-lithuanian-desktop:     myspell-lt
task-macedonian-kde-desktop: kde-l10n-mk
task-malayalam-kde-desktop:  kde-l10n-ml
task-polish:                 doc-linux-pl, doc-linux-pl-html 
task-sinhala-kde-desktop:    kde-l10n-si
task-slovenian-desktop:      myspell-sl
task-spanish:                doc-debian-es
task-thai-desktop:           myspell-th
task-thai-kde-desktop:       kde-l10n-th
task-ukrainian:              doc-debian-uk
task-vietnamese-kde-desktop: kde-l10n-vi

Also, while at it: some inconsistency?

--- a/debian-tasks.desc	2019-03-07 19:20:48.179994586 +0100
+++ b/debian-tasks.desc	2019-03-07 19:28:48.227824535 +0100
@@ -1278,7 +1278,7 @@
 Enhances: kde-desktop, ukrainian-desktop
 Section: l10n
 
-Task: sinhala-desktop
+Task: uyghur-desktop
 Key: 
   task-uyghur-desktop
 Enhances: desktop

Please check.

Wolfgang