Remove non needed test for ErrTooManyConnections in client's readLoop

Since we now return an error before setting up the client's readLoop,
testing for this error in readLoop in not needed.

server/client.go

@@ -270,7 +270,7 @@ func (c *client) readLoop() {
 
 		if err := c.parse(b[:n]); err != nil {
 			// handled inline
-			if err != ErrMaxPayload && err != ErrAuthorization && err != ErrTooManyConnections {
+			if err != ErrMaxPayload && err != ErrAuthorization {
 				c.Errorf("Error reading from client: %s", err.Error())
 				c.sendErr("Parser Error")
 				c.closeConnection()