tweak(citizen-devtools): remove slow system performance warning

[DaniGP17]

Goal of this PR

Remove the slow performance warning, since it provides no actionable information for users and can appear even on high-end systems, leading to confusion rather than helping diagnose real issues.

How is this PR achieving the goal

Remove the warn block

This PR applies to the following area(s)

FiveM, RedM

Successfully tested on

Game builds: none
Platforms: Windows, Linux

Checklist

• Code compiles and has been tested successfully.
• Code explains itself well and/or is documented.
• My commit message explains what the changes do and what they are for.
• No extra compilation warnings are added by these changes.

Fixes issues

fixes https://forum.cfx.re/t/suggestion-allow-toggle-remove-slow-system-performance-warning/5356888

[radium-cfx]

When removing this, we can also get rid of the logic around lastHitch and currentTotal and do some further cleanup there.

[DaniGP17]

Thanks, I've removed lastHitch and currentTotal, let me know what else do we need to clean 🙂