[neon/qt6/qt6-svg/Neon/release] debian/upstream: Revert "empty signing-key.asc to make tooling happy"

[Carlos De Maine]

Git commit ce7f8f10edfc976a8fbcf0e91a8e8cb30c9fd458 by Carlos De Maine.
Committed on 09/01/2025 at 12:37.
Pushed by carlosdem into branch 'Neon/release'.

Revert "empty signing-key.asc to make tooling happy"

This reverts commit 2e68d8c89d5e2eb5b9cdfde753425e31ff862d7e

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

https://invent.kde.org/neon/qt6/qt6-svg/-/commit/ce7f8f10edfc976a8fbcf0e91a8e8cb30c9fd458

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