Although it would be possible to modify these files, it would create
conflicts when rebasing. Instead, this commit removes them entirely
and another commit can start from scratch, borrowing content from the
original files.
The drawback of this approach is that some content updates from Gitea
that also need updating in Forgejo will have to be copy/pasted
instead of being merged.
(cherry picked from commit eb85782115)
(cherry picked from commit 34401f2004)
(cherry picked from commit ef43b1c691)
(cherry picked from commit d17fe25e2f)
(cherry picked from commit 3f65dea3e7)
(cherry picked from commit 3cacb64a1b)
(cherry picked from commit b531b014b7)
(cherry picked from commit adf6e7a840)
(cherry picked from commit 68c19d977d)
(cherry picked from commit 31aa8647ec)
(cherry picked from commit be70dd7208)
(cherry picked from commit 7f44bb60b1)
(cherry picked from commit 5098f1224b)
(cherry picked from commit dc7a859144)
(cherry picked from commit f1e78dd006)
(cherry picked from commit c41ba7a148)
(cherry picked from commit f1da66a918)
(cherry picked from commit 99194a3664)
(cherry picked from commit 52f356f6a9)
(cherry picked from commit c93ffa72ae)
(cherry picked from commit 477c7454d3)
(cherry picked from commit 413df23a40)
[DOCS] delete Gitea specific files that need rewriting for Forgejo (squash)
(cherry picked from commit df78cedd05)
(cherry picked from commit 3b9178b3e5)