Sqlite: Don't register ranking any more

We don't use it now but maybe later.

Change-Id: I46912728321c5523b59cf8e76a75c538f903b618
Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io>

src/libs/sqlite/sqlitedatabasebackend.cpp

@@ -105,7 +105,6 @@ void DatabaseBackend::open(Utils::SmallStringView databaseFilePath, OpenMode mod
 
     checkDatabaseCouldBeOpened(resultCode);
 
-    registerRankingFunction();
     cacheTextEncoding();
 }