graphics/digikam: Fix fetch with AUTOTAGS option

Remove unused (confirmed by upstream maintainer Michael Miller
<[email protected]>) and no longer available for download
resnet152-v2-7.onnx.

PR: 286147
Reported by: Brett <[email protected]>
MFH: 2025Q2

(cherry picked from commit 6ef2642c38b084fad69f90143b8c88646faf4439)