Do not force SerialGC on renaissance gates

Author: c-refice

compiler/mx.compiler/mx_compiler.py

@@ -410,7 +410,7 @@ def _gate_scala_dacapo(name, iterations, extraVMarguments=None):
 def _gate_renaissance(name, iterations, extraVMarguments=None):
     if iterations == -1:
         return
-    vmargs = ['-Xms2g', '-XX:+UseSerialGC', '-XX:-UseCompressedOops'] + _compiler_error_options() + _remove_empty_entries(extraVMarguments)
+    vmargs = ['-Xms2g', '-XX:-UseCompressedOops'] + _compiler_error_options() + _remove_empty_entries(extraVMarguments)
     args = ['-r', str(iterations)]
     return _run_benchmark('renaissance', name, args, vmargs)