FAFT: Remove the legacy use_pyauto and use_faft arguments

These two arguements were introduced when ServoTest supported connecting
remote PyAuto and FAFT Client RPC servers. Now ServoTest only serves
FAFT Client, meaning that use_pyauto is always False and use_faft is always
True. So remove these arguments.

BUG=chrome-os-partner:21118;chromium-os:215491
TEST=Manual
Ran the affected test cases, firmware_FAFTSetup, on Spring and passed.

Change-Id: I5c740faddb97f81f052e720548bfce8a39b405e3
Reviewed-on: https://gerrit.chromium.org/gerrit/62641
Reviewed-by: Yusuf Mohsinally <mohsinally@chromium.org>
Reviewed-by: Richard Barnette <jrbarnette@chromium.org>
Commit-Queue: Tom Wai-Hong Tam <waihong@chromium.org>
Tested-by: Tom Wai-Hong Tam <waihong@chromium.org>
diff --git a/server/site_tests/firmware_CgptState/control b/server/site_tests/firmware_CgptState/control
index c71cb3f..9f6940e 100644
--- a/server/site_tests/firmware_CgptState/control
+++ b/server/site_tests/firmware_CgptState/control
@@ -30,7 +30,6 @@
 def run_cgptstate(machine):
     host = hosts.create_host(machine, servo_args=servo_args)
     job.run_test("firmware_CgptState", host=host, cmdline_args=args,
-                 use_faft=True, disable_sysinfo=True,
-                 dev_mode=False, tag="normal")
+                 disable_sysinfo=True, dev_mode=False, tag="normal")
 
 parallel_simple(run_cgptstate, machines)