Remove the no-op on unmodified files

[jradtilbrook]

For performance reasons this plugin doesn't currently run if the file is not dirty. That means if you try run the formatter on a clean file it won't do anything, even if the formatting is wrong. This is more annoying that useful so I want to undo that and run it against any file

[jradtilbrook]

Should just be removing these

vscode-php-cs-fixer/src/extension.ts

Lines 27 to 31 in 8f2260e

	// exit early if no changes have been made
	if (!document.isDirty) {
	return resolve([]);
	}