Clean an IDE warning about unthrown exception.
Since r1577757 the setSSLEngine() method is a pure setter, it no longer calls reset() and no longer throws an IOException.

(An alternative way to silence such warnings is to document the exception in Javadoc for the method).

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1577902 13f79535-47bb-0310-9956-ffa450edef68