In Litmus version 2, we already remove global variables. you can see here #3937

However, with the change of Litmus version to 3, we have a new global variable, which we need to change to a field in the struct because global variables make unit testing difficult.

Here's a global variable what we need to remove.

We need to find and change all the places where that global variable is used, like this

Here's an example of what we did first #4136

Anyone who finds good first issues or participates in hacktoberfest can take this issue.