delete non-existing ut from muted (#7672)

Author: zverevgeny

.github/config/muted_ya.txt

@@ -15,7 +15,6 @@ ydb/core/kqp/ut/query KqpLimits.QueryReplySize
 ydb/core/kqp/ut/query KqpQuery.QueryTimeout
 ydb/core/kqp/ut/scan KqpRequestContext.TraceIdInErrorMessage
 ydb/core/kqp/ut/scheme KqpOlapScheme.TenThousandColumns
-ydb/core/kqp/ut/scheme KqpOlap.OlapRead_GenericQuerys
 ydb/core/kqp/ut/scheme KqpOlap.OlapRead_StreamGenericQuery
 ydb/core/kqp/ut/scheme KqpOlap.OlapRead_UsesGenericQueryOnJoinWithDataShardTable
 ydb/core/kqp/ut/scheme KqpScheme.AlterAsyncReplication