Some code improvements

Fixes #439

lib/modifiedScreenAPI.js

@@ -212,7 +212,7 @@
 						/\(\s*(?:(min|max)-)?device-(width|height):\s+(\d+\.?\d*)px\s*\)/,
 						function(m, type, dimension, value){
 							value = parseFloat(value);
-							let newCompareValue = value;
+							let newCompareValue;
 							switch (type){
 								case "min":
 									if (value <= dimensions[dimension]){

lib/randomSupplies.js

@@ -63,7 +63,6 @@
 	};
 
 	const settings = require("./settings");
-	const logging = require("./logging");
 	const extension = require("./extension");
 	
 	function getDomain(window){

options/presets.js

@@ -152,7 +152,7 @@
 	introduction.textContent = extension.getTranslation("presets_introduction");
 	head.appendChild(introduction);
 	
-	const [settingsLoaded, presets] = await Promise.all([
+	const [, presets] = await Promise.all([
 		settings.loaded,
 		(await fetch("presets.json")).json()
 	]);