Remove redundant "go build -mod=vendor" from docker build

Change-Id: I2d488376c637fa8ac96b49fb6bae6ec25811c84a
diff --git a/VERSION b/VERSION
index ee90284..74bcb8d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.4
+1.0.5-dev