Remove unnecessary "throws IOException"

The IOException in the methods signature is misleading. The method
never throws an IOException.

Author: stefanbirkner

src/test/java/com/github/stefanbirkner/fakesftpserver/rule/FakeSftpServerRuleTest.java

@@ -847,7 +847,7 @@ private static void uploadFile(
         FakeSftpServerRule server,
         String pathAsString,
         byte[] content
-    ) throws JSchException, SftpException, IOException {
+    ) throws JSchException, SftpException {
         Session session = connectToServer(server);
         ChannelSftp channel = connectSftpChannel(session);
         try {