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

[Carlos De Maine]

Git commit 33108ccb82384819e030297e95ad05f2021fb084 by Carlos De Maine.
Committed on 09/01/2025 at 12:33.
Pushed by carlosdem into branch 'Neon/release'.

Revert "fake signing-key.asc"

This reverts commit 04f8539c6f2a0393a8a55729418c820ded721839

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

https://invent.kde.org/neon/qt6/qt6-serialbus/-/commit/33108ccb82384819e030297e95ad05f2021fb084

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