MemoryManager: remove class name from object references

it's possible to see this information by looking up the hash, which it's necessary to do in order to see any interesting information anyway.

src/MemoryManager.php

@@ -461,7 +461,7 @@ class MemoryManager{
 
 			++$refCounts[$hash];
 
-			$data = "(object) $hash@" . get_class($from);
+			$data = "(object) $hash";
 		}elseif(is_array($from)){
 			if($recursion >= 5){
 				return "(error) ARRAY RECURSION LIMIT REACHED";