Net-client: remove extra catch block

Handled by IOException block (it's a superclass of ConnectException and does the same thing).

java/libraries/net/src/processing/net/Client.java

@@ -107,10 +107,6 @@ public class Client implements Runnable {
         // no such method, or an error.. which is fine, just ignore
       }
 
-    } catch (ConnectException ce) {
-      ce.printStackTrace();
-      dispose();
-
     } catch (IOException e) {
       e.printStackTrace();
       dispose();