[neon/qt6/qt6-datavis3d/Neon/release] debian/upstream: Revert "fake signing-key.asc"

[Carlos De Maine]

Git commit 0e6471d0caaa310260abcfd434def303f59c1876 by Carlos De Maine.
Committed on 09/01/2025 at 12:19.
Pushed by carlosdem into branch 'Neon/release'.

Revert "fake signing-key.asc"

This reverts commit 86fb4fd39199af57f68a0b6709e3c04a4029bf7c

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

https://invent.kde.org/neon/qt6/qt6-datavis3d/-/commit/0e6471d0caaa310260abcfd434def303f59c1876

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