What are the side effects if the file is deleted? TypeInfo.dat

See reference below - in short, if you are not using NameMapping then deleting it won't cause any effect [Community solution]

"The TypeInfo file contains info on properties and methods of objects added to NameMapping. What is stored there in determined by the following setting - Name Mapping > Options > Stop object data

This is needed so that when you are writing a script and the mapped object you are working with is missing from the system, Code Completion will still show available methods and properties for this object."