log cleanup

core/java/src/net/i2p/client/I2PSessionImpl.java

@@ -577,10 +577,7 @@ abstract class I2PSessionImpl implements I2PSession, I2CPMessageReader.I2CPMessa
      */
     void propogateError(String msg, Throwable error) {
         if (_log.shouldLog(Log.ERROR)) 
-            _log.error(getPrefix() + "Error occurred: " + msg + " - " + error.getMessage());
-        if (_log.shouldLog(Log.ERROR))
-            _log.error(getPrefix() + " cause", error);
-        
+            _log.error(getPrefix() + "Error occurred: " + msg, error);
         if (_sessionListener != null) _sessionListener.errorOccurred(this, msg, error);
     }