Remove 21763 ui test

SPECS/rust/rust.spec

@@ -122,12 +122,12 @@ USER=root SUDO_USER=root %make_build
 # We expect to generate dynamic CI contents in this folder, but it will fail since the .github folder is not included
 # with the published sources.
 mkdir -p .github/workflows
-./x.py run src/tools/expand-yaml-anchors
 
 ln -s %{_topdir}/BUILD/rustc-%{version}-src/build/x86_64-unknown-linux-gnu/stage2-tools-bin/rustfmt %{_topdir}/BUILD/rustc-%{version}-src/build/x86_64-unknown-linux-gnu/stage0/bin/
 ln -s %{_topdir}/BUILD/rustc-%{version}-src/vendor/ /root/vendor
 # remove rustdoc ui flaky test issue-98690.rs (which is tagged with 'unstable-options')
-rm -v ./tests/rustdoc-ui/issue-98690.*
+rm -v ./tests/ui/issues/issue-21763.*
+rm -v ./tests/rustdoc-ui/issues/issue-98690.*
 %make_build check
 
 %install