Remove Unnecessary Imports for C#

Only works with versions of the C# extension prior or equal to 1.26.0! You can change your version by opening the C# extension's page, clicking on the drop down arrow next to "Uninstall", clicking "Install Another Version...", then selecting 1.26.0.

Adds a code action to remove unnecessary imports from C# files. Simply add source.organizeImports to your editor.codeActionsOnSave like so:

{
    "editor.codeActionsOnSave": [
        "source.organizeImports"
    ]
}

and any unused using directives in C# files will be automatically removed upon saving.