[neon/qt6/qtcreator/Neon/release] debian/upstream: Revert "fake signing-key"

[Carlos De Maine]

Git commit 480481e33a74dce01e00966ee346bad5af8ccc92 by Carlos De Maine.
Committed on 09/01/2025 at 12:41.
Pushed by carlosdem into branch 'Neon/release'.

Revert "fake signing-key"

This reverts commit c0b11e2e312b22481eeaec2d274223ef739dab58

D  +0    -0    debian/upstream/signing-key.asc

https://invent.kde.org/neon/qt6/qtcreator/-/commit/480481e33a74dce01e00966ee346bad5af8ccc92

diff --git a/debian/upstream/signing-key.asc b/debian/upstream/signing-key.asc
deleted file mode 100644
index e69de29..0000000