Avoid using /dev/null in test

Windows build bot was not happy with this
(http://lab.llvm.org:8011/#/builders/13/builds/3327/steps/7/logs/FAIL__MLIR__run-reproducer_mlir)

diff --git a/mlir/test/Pass/run-reproducer.mlir b/mlir/test/Pass/run-reproducer.mlir
index 9caa3f6..af36c5b 100644 (file)
--- a/mlir/test/Pass/run-reproducer.mlir
+++ b/mlir/test/Pass/run-reproducer.mlir
@@ -1,4 +1,4 @@
-// configuration: -mlir-disable-threading=true -pass-pipeline='func(cse,canonicalize)' -print-ir-before=cse -o /dev/null
+// configuration: -mlir-disable-threading=true -pass-pipeline='func(cse,canonicalize)' -print-ir-before=cse
 
 // Test of the reproducer run option. The first line has to be the
 // configuration (matching what is produced by reproducer).