Eliminate if-statement (#3561)

Co-authored-by: Acid Chicken (硫酸鶏) <root@acid-chicken.com>

src/client/app/common/views/filters/number.ts

@@ -1,6 +1,3 @@
 import Vue from 'vue';
 
-Vue.filter('number', (n) => {
-	if (n == null) return 'N/A';
-	return n.toLocaleString();
-});
+Vue.filter('number', n => n == null ? 'N/A' : n.toLocaleString());