Remove redundant JVM options

[kwvanderlinde]

Identify the Bug or Feature request

Resolves #5971

Description of the Change

Removes options -Dfile.encoding=UTF-8 and -XX:+ShowCodeDetailsInExceptionMessages as these are already the default behaviour in recent Java versions.

Possible Drawbacks

None

Documentation Notes

N/A

Release Notes

• Removed some unnecessary JVM arguments from the build.

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This change is 

[FullBleed]

I use a java option that I never see anyone else use in order to control where the .openjfx dir is created -Djavafx.cachedir. I hate stuff being written to my User root directory. That option isn't being caught in the crossfire here is it?

[kwvanderlinde]

I use a java option that I never see anyone else use in order to control where the .openjfx dir is created -Djavafx.cachedir. I hate stuff being written to my User root directory. That option isn't being caught in the crossfire here is it?

@FullBleed Nothing under #5970 will prevent standard configurations such as that one. It will only make command line options unnecessary in vanilla cases.