diff --git a/.kokoro/presubmit/presubmit.cfg b/.kokoro/presubmit/presubmit.cfg
deleted file mode 100644
index ac4cc5847..000000000
--- a/.kokoro/presubmit/presubmit.cfg
+++ /dev/null
@@ -1,7 +0,0 @@
-# Format: //devtools/kokoro/config/proto/build.proto
-
-# Disable system tests.
-env_vars: {
-    key: "NOX_SESSION"
-    value: "unit_noextras unit cover docs docfx"
-}