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

[Carlos De Maine]

Git commit fcb0ff144520595afb5367768cd52276df824099 by Carlos De Maine.
Committed on 09/01/2025 at 12:30.
Pushed by carlosdem into branch 'Neon/release'.

Revert "fake signing-key.asc"

This reverts commit 12bf90d4cfda7d34e74b0a4a8a08aceef158dff5

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

https://invent.kde.org/neon/qt6/qt6-networkauth/-/commit/fcb0ff144520595afb5367768cd52276df824099

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