tst_qnetworkreply - remove redundant semicolon

... after a member-function declaration: this would be a compilation error
anywhere outside of a class-definition, allowed as 'opt' inside a class-definition
and essentially not needed at all (and is already different from other
member-functions we have in the same code).

Change-Id: Ia689a41bf2a1052cd19eb8fb4766ed9635c20c88
Reviewed-by: Jesus Fernandez <jesus.fernandez@qt.io>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

tests/auto/network/access/qnetworkreply/tst_qnetworkreply.cpp

@@ -132,7 +132,7 @@ class tst_QNetworkReply: public QObject
                     "location: %1\r\n"
                     "\r\n";
         return s;
-    };
+    }
 
     QEventLoop *loop;
     enum RunSimpleRequestReturn { Timeout = 0, Success, Failure };