jstreegrid: remove handling of IE < 8 using navigator interface to avoid warnings in chrome

[fbergkemper]

Starting in Chrome 101, the amount of information available in the
User Agent string will be reduced.

This PR removes the specific handling of IE < 8, to avoid issues
in Chrome >= 101.

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[pstorz]

The title should contain the reason why we remove that support..

Why not simply remove the code in question without extra comment?
E8 is alread 13 years old and only running on OS that are not supported anymore.

[fbergkemper]

Why not simply remove the code in question without extra comment? E8 is alread 13 years old and only running on OS that are not supported anymore.

It's IE < 8, which I would think nobody should use nowadays, totally agree with you. However, I kept it for now commented out in case of an upstream change of the extension, so I remember what is going on and don't re-introduce by accident.

[pstorz]

It's IE < 8, which I would think nobody should use nowadays, totally agree with you. However, I kept it for now commented out in case of an upstream change of the extension, so I remember what is going on and don't re-introduce by accident.

But that is what git is for, isn't it?

[fbergkemper]

It's IE < 8, which I would think nobody should use nowadays, totally agree with you. However, I kept it for now commented out in case of an upstream change of the extension, so I remember what is going on and don't re-introduce by accident.

But that is what git is for, isn't it?

I'd like to have a clear hint, but I'm going to remove the code section.
It's not worth a discussion, let's get this done.

[pstorz]

Good work!