Remove unused code

src/main/java/de/ailis/usb4java/DeviceNotFoundException.java

@@ -5,7 +5,6 @@
 
 package de.ailis.usb4java;
 
-
 /**
  * Thrown when a USB device was not found by id.
  *

src/main/java/de/ailis/usb4java/Usb4JavaRuntimeException.java

@@ -35,31 +35,6 @@ public final class Usb4JavaRuntimeException extends RuntimeException
         this.errorCode = errorCode;
     }
 
-    /**
-     * Constructor.
-     * 
-     * @param message
-     *            The error message.
-     */
-    public Usb4JavaRuntimeException(final String message)
-    {
-        super("USB error: " + message);
-        this.errorCode = 0;
-    }
-
-    /**
-     * Constructor.
-     * 
-     * @param errorCode
-     *            The error code.
-     */
-    public Usb4JavaRuntimeException(final int errorCode)
-    {
-        super(String.format("USB error %d: %s", -errorCode,
-            LibUSB.errorName(errorCode)));
-        this.errorCode = errorCode;
-    }
-
     /**
      * Constructor.
      *