This is a patch to fix https://issues.guix.gnu.org/52651

syncthing-gtk fails to start due to multiple librsvg in the GI_TYPELIB_PATH. The package includes gtk+ as an input, which propagates librsvg-bootstrap, as well as an explicit librsvg input. This patch removes the librsvg input resolving the issue.

I've tested the package builds and runs successfully.

Thanks!