Update Top JDK APIs test expectation

Author: owen-mc

java/ql/test/ext/TopJdkApis/TopJdkApisTest.expected

@@ -1,8 +1,6 @@
 | java.lang.Runnable#run() | no manual model |
-| java.lang.String#valueOf(Object) | no manual model |
 | java.lang.System#getProperty(String) | no manual model |
 | java.lang.System#setProperty(String,String) | no manual model |
-| java.lang.Throwable#printStackTrace() | no manual model |
 | java.text.Format#format(Object) | no manual model |
 | java.text.MessageFormat#format(String,Object[]) | no manual model |
 | java.util.Comparator#comparing(Function) | no manual model |