Revert "[clang] [test] Skip a test that sets PATH on Windows (llvm#95096)"

This reverts commit f5a93c5.

Author: mstorsjo

clang/test/Driver/spirv-toolchain.cl

@@ -92,7 +92,7 @@
 // RUN: mkdir -p %t/versioned
 // RUN: touch %t/versioned/spirv-as-%llvm-version-major \
 // RUN:   && chmod +x %t/versioned/spirv-as-%llvm-version-major
-// RUN: %if !system-windows %{ env "PATH=%t/versioned" %clang -### --target=spirv64 -x cl -c --save-temps %s 2>&1 \
-// RUN:   | FileCheck -DVERSION=%llvm-version-major --check-prefix=VERSIONED %s %}
+// RUN: env "PATH=%t/versioned" %clang -### --target=spirv64 -x cl -c --save-temps %s 2>&1 \
+// RUN:   | FileCheck -DVERSION=%llvm-version-major --check-prefix=VERSIONED %s
 
 // VERSIONED: {{.*}}spirv-as-[[VERSION]]