test-release.sh: Remove test-suite from LLVM_ENABLE_PROJECTS

I think this was just being ignored before, but now it crashes because
we're checking if the projects that we're trying to enable are valid.
There is no test-suite project (it's a separate repo with separate
handling), so we should never try to enable it.

Differential Revision: https://reviews.llvm.org/D119322

llvm/utils/release/test-release.sh

@@ -249,11 +249,6 @@ if [ $do_libs = "yes" ]; then
     runtimes="$runtimes libunwind"
   fi
 fi
-case $do_test_suite in
-  yes|export-only)
-    projects="$projects test-suite"
-    ;;
-esac
 if [ $do_openmp = "yes" ]; then
   projects="$projects openmp"
 fi