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

[Carlos De Maine]

Git commit be03502c199a5fa134123e3998fb2cc6a8bb55d4 by Carlos De Maine.
Committed on 09/01/2025 at 12:28.
Pushed by carlosdem into branch 'Neon/release'.

Revert "fake signing-key.asc"

This reverts commit 57b8a769f70507cd85ecf30a77a26697225ed021

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

https://invent.kde.org/neon/qt6/qt6-mqtt/-/commit/be03502c199a5fa134123e3998fb2cc6a8bb55d4

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