Update gql-errors.adoc

Author: NataliaIvakina

modules/ROOT/pages/errors/gql-errors.adoc

@@ -6,17 +6,13 @@
 //The following page provides an overview of all server errors in Neo4j, along with some scenarios and their possible solutions.
 The following page provides an overview of all GQLSTATUS server error codes in Neo4j.
 All errors in Neo4j have severity level `ERROR`.
-All errors in Neo4j have severity level `ERROR`.
 
 * <<_connection-exceptions, Connection exceptions>>
 * <<_data-exceptions, Data exceptions>>
 
-
-
 [[_connection-exceptions]]
 == Connection exceptions
 
-
 Connection exceptions occur when the client is unable to connect to the server for various reasons such as network issues, server-side routing being disabled, or the database being unavailable, etc.
 
 === 08000