Remove trailing whitespace

[ghost]

Description

Remove all trailing whitespace that I could find.

Related Issue

Fixes #1166

Motivation and Context

Trailing whitespace can be annoying when developing, and increases repository size.

How Has This Been Tested?

I am confident that this does not do anything.

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 change)

Checklist:

• My code follows the code style of this project. (???)
• My change requires a change to the documentation.
• I have updated the documentation accordingly. (???)
• I have added tests to cover my changes.
• All new and existing tests passed.