Binhosts: enable PCQ postsubmit binhosts.

BUG=chromium:963528
TEST=run_tests, manual

Change-Id: I3cd0727791f131e9c3934497112941cc32b031f3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1677133
Tested-by: Alex Klein <saklein@chromium.org>
Reviewed-by: David Burger <dburger@chromium.org>
Auto-Submit: Alex Klein <saklein@chromium.org>
diff --git a/api/controller/sysroot.py b/api/controller/sysroot.py
index 8276629..ffa8132 100644
--- a/api/controller/sysroot.py
+++ b/api/controller/sysroot.py
@@ -54,8 +54,7 @@
 
   build_target = build_target_util.BuildTarget(name=build_target_name)
   target_sysroot = sysroot_lib.Sysroot(sysroot_path)
-  run_configs = sysroot.SetupBoardRunConfig(usepkg=not compile_source,
-                                            use_parallel_binhost=True)
+  run_configs = sysroot.SetupBoardRunConfig(usepkg=not compile_source)
 
   if not target_sysroot.Exists():
     cros_build_lib.Die('Sysroot has not been created. Run Create first.')