Replace "" with string.Empty

Author: IvenBach

Rubberduck.Parsing/Symbols/Declaration.cs

@@ -478,7 +478,7 @@ public string AsTypeNameWithoutArrayDesignator
                 {
                     return AsTypeName;
                 }
-                return AsTypeName.Replace("(", "").Replace(")", "").Trim();
+                return AsTypeName.Replace("(", string.Empty).Replace(")", string.Empty).Trim();
             }
         }