remove this for now, I'll add it later

Author: smalyshev

x-pack/plugin/src/yamlRestTest/resources/rest-api-spec/test/esql/190_lookup_join.yml

@@ -230,13 +230,3 @@ lookup-no-key:
 
   - match: { error.type: "verification_exception" }
   - contains: { error.reason: "Unknown column [key] in right side of join" }
----
-lookup-no-key-only-key:
-  - do:
-      esql.query:
-          body:
-            query: 'FROM test | LOOKUP JOIN test-lookup-no-key ON key | KEEP key'
-      catch: "bad_request"
-
-  - match: { error.type: "verification_exception" }
-  - contains: { error.reason: "Unknown column [key] in right side of join" }