This is suspect to break our afe "debug" link. I am going to revert it for now.

Revert "[autotest] Add heartbeat AFE endpoint to shard Autotest"

This reverts commit 1e10d745c65ecafa79bd4f0b4f0b743bd5f1eff3.

Change-Id: I81fd554a910c8c5b7537b34ec13301fcf15be3fd
Reviewed-on: https://chromium-review.googlesource.com/217980
Reviewed-by: Fang Deng <fdeng@chromium.org>
Commit-Queue: Fang Deng <fdeng@chromium.org>
Tested-by: Fang Deng <fdeng@chromium.org>
diff --git a/frontend/afe/json_rpc/serviceHandler.py b/frontend/afe/json_rpc/serviceHandler.py
index 2481d57..b0d9e84 100644
--- a/frontend/afe/json_rpc/serviceHandler.py
+++ b/frontend/afe/json_rpc/serviceHandler.py
@@ -21,22 +21,9 @@
 
 import traceback
 
-from json import decoder
-
-try:
-    # Django JSON encoder uses the standard json encoder but can handle DateTime
-    from django.core.serializers import json as django_encoder
-    json_encoder = django_encoder.DjangoJSONEncoder()
-except ImportError:
-    from json import encoder
-    json_encoder = encoder.JSONEncoder()
-
+from json import decoder, encoder
 from autotest_lib.client.common_lib.cros.graphite import stats
 
-
-json_decoder = decoder.JSONDecoder()
-
-
 def customConvertJson(value):
     """\
     Recursively process JSON values and do type conversions.
@@ -59,6 +46,9 @@
     else:
         return value
 
+json_encoder = encoder.JSONEncoder()
+json_decoder = decoder.JSONDecoder()
+
 
 def ServiceMethod(fn):
     fn.IsServiceMethod = True