Just drop ServerUtils instance on clear()

Author: Andre601

src/main/java/com/extendedclip/papi/expansion/server/ServerExpansion.java

@@ -75,7 +75,6 @@ public boolean canRegister() {
 
 	@Override
 	public void clear() {
-		serverUtils.clear();
 		dateFormats.clear();
 		serverUtils = null;
 		cache.invalidateAll();

src/main/java/com/extendedclip/papi/expansion/server/ServerUtils.java

@@ -87,11 +87,6 @@ public String getBuild() {
         }
     }
 
-    public void clear() {
-        craftServer = null;
-        tps = null;
-    }
-    
     public double[] getTps() {
         if (hasTpsMethod) {
             return Bukkit.getTPS();