Deprecate max_updates from AU tests

We don't really need max_updates anymore. The tests that depend on it,
can easily send an update check URL with query string no_update=True if
they don't want to be answered with an update anymore.

BUG=chromium:1004489
TEST=These can't be tested locally. They need a lab devsever, so we need
to land this and figure out what went wrong in go/cros-au-tests

Change-Id: I39c73612e1b6815c83f5f6ea21a6ce1483ab3c32
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2057929
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Kyle Shimabukuro <kyleshima@chromium.org>
Commit-Queue: Amin Hassani <ahassani@chromium.org>
diff --git a/server/site_tests/autoupdate_ForcedOOBEUpdate/control.interrupt.suspend.full.moblab b/server/site_tests/autoupdate_ForcedOOBEUpdate/control.interrupt.suspend.full.moblab
index 0aa9fc6..f44fe90 100644
--- a/server/site_tests/autoupdate_ForcedOOBEUpdate/control.interrupt.suspend.full.moblab
+++ b/server/site_tests/autoupdate_ForcedOOBEUpdate/control.interrupt.suspend.full.moblab
@@ -24,6 +24,6 @@
 def run(machine):
     host = hosts.create_host(machine)
     job.run_test('autoupdate_ForcedOOBEUpdate', host=host, full_payload=True,
-                 interrupt='suspend', max_updates=1, moblab=True, **args_dict)
+                 interrupt='suspend', moblab=True, **args_dict)
 
 job.parallel_simple(run, machines)