[autotest] Remove site_rpc_interface

BUG=chromium:672727
TEST=Run unittests

Change-Id: I8535b121ba7f2317cccec981bf2a8a36ca2639cf
Reviewed-on: https://chromium-review.googlesource.com/435850
Commit-Ready: Allen Li <ayatane@chromium.org>
Tested-by: Allen Li <ayatane@chromium.org>
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
Reviewed-by: Allen Li <ayatane@chromium.org>
diff --git a/server/site_utils.py b/server/site_utils.py
index 85e6f6e..5bc716e 100644
--- a/server/site_utils.py
+++ b/server/site_utils.py
@@ -615,7 +615,7 @@
     Suite job created by run_suite follows the naming convention of:
     [build]-test_suites/control.[suite]
     For example: lumpy-release/R46-7272.0.0-test_suites/control.bvt
-    The naming convention is defined in site_rpc_interface.create_suite_job.
+    The naming convention is defined in rpc_interface.create_suite_job.
 
     Test job created by suite job follows the naming convention of:
     [build]/[suite]/[test name]