GUID stuff unnecessary

[neworderofjamie]

Previously the windows build system had to create GUIDs to hook projects together but this isn't required any more but the code remains. Remove!

[saadkhi]

I want to work on it please guide.

[neworderofjamie]

So you will need access to a windows machine to test this one but it should be simply a matter of:

1. Removing all the code for generating GUIDs (and the ObjBase header at the top) https://github.com/genn-team/genn/blob/master/src/genn/generator/generator.cc#L85-L124
2. Removing the projectGUID parameter from https://github.com/genn-team/genn/blob/master/src/genn/genn/code_generator/generateMSBuild.cc#L15

[saadkhi]

oky, @neworderofjamie can you assign this issue to me

[saadkhi]

@neworderofjamie I have removed it. Now, I want to test it. Can you guide me through the testing process?

[neworderofjamie]

I would test as follows:

1. Open the GeNN solution in Visual Studio (https://github.com/genn-team/genn/blob/master/genn.sln) and try building it
2. Install PyGeNN (https://genn-team.github.io/genn/documentation/5/installation.html) and check one of the user projects runs
3. Make a PR and check the CI status