remove language version -- use latest ij plugin.

.bazelproject

diff --git a/.bazelproject b/.bazelproject
index 1574656..03a69f4 100644
--- a/.bazelproject
+++ b/.bazelproject
@@ -25,7 +25,5 @@
   */unittests/*
   */integrationtests/*
 
-kotlin_language_version: 1.2
-
 additional_languages:
   kotlin
\ No newline at end of file