firmware tests: Reduce retries to 0

According to data by Philip in the bug, retries don't seem to have
a huge impact on the success rate but cost test time, so let's get
rid of them.

BUG=b:171297016
TEST=none

Change-Id: I85b6a5a0928db87be788f1da05a0631e55b3860d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2656099
Reviewed-by: Brent Peterson <[email protected]>
Tested-by: Patrick Georgi <[email protected]>
Commit-Queue: Patrick Georgi <[email protected]>
diff --git a/server/site_tests/firmware_ECUpdateId/control b/server/site_tests/firmware_ECUpdateId/control
index 5944e74..efdbdca 100644
--- a/server/site_tests/firmware_ECUpdateId/control
+++ b/server/site_tests/firmware_ECUpdateId/control
@@ -13,6 +13,7 @@
 TEST_CATEGORY = "Functional"
 TEST_CLASS = "firmware"
 TEST_TYPE = "server"
+JOB_RETRIES = 0
 DEPENDENCIES = "ec:cros, servo_state:WORKING"
 
 DOC = """