MudLineChart: remove Integrate() call because the return not used

[GeeSuth]

Description

follow up #1139 (comment) this code obviously not used else where, even in UI

How Has This Been Tested?

I never noticed used the return value in same class in all return/set variable.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• The PR is submitted to the correct branch (dev).
• My code follows the code style of this project.
• I've added relevant tests.

[ScarletKuro]

Yeah, I think it's not used. I remember contacting the original author about this #1139 (comment)

[ScarletKuro]

Can you make the PR tp follow the template with description, how it was tested, type of change and so on?

[GeeSuth]

Sure, sorry for that

[GeeSuth]

Yeah, I think it's not used. I remember contacting the original author about this #1139 (comment)

Interesting, I don't notice this before.
but seems good we both notice that.

[henon]

Thanks @GeeSuth