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

[Carlos De Maine]

Git commit 776b21e83b93a45aac3b0cd0713aa87a7f4b7461 by Carlos De Maine.
Committed on 09/01/2025 at 12:17.
Pushed by carlosdem into branch 'Neon/release'.

Revert "fake signing-key.asc"

This reverts commit f2135cb4584ee1ff2d7c1a49dfd37ad5e0259acb

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

https://invent.kde.org/neon/qt6/qt6-charts/-/commit/776b21e83b93a45aac3b0cd0713aa87a7f4b7461

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