disable reentrant check in benchmarks

Author: liufengyun

bench/src/test/scala/Benchmarks.scala

@@ -57,7 +57,7 @@ object BenchTests extends OnlineRegressionReport {
 
   def stdLib = compiler.compileList("compileStdLib", stdlibFiles, "-migration" :: scala2mode)
 
-  def dotty = compiler.compileDir(dottyDir, ".",  List("-deep", "-Ycheck-reentrant", "-strict"))
+  def dotty = compiler.compileDir(dottyDir, ".",  List("-deep", "-strict"))
 
   // NOTE: use `val persistor = ...` would cause persistor ignore command line options for `resultDir`
   override def persistor = new DecoratorPersistor(super.persistor)