8232617: Update the outdated code comments in java.lang.System class

Reviewed-by: dholmes, bchristi

src/java.base/share/classes/java/lang/System.java

@@ -94,10 +94,8 @@ import sun.security.util.SecurityConstants;
 public final class System {
     /* Register the natives via the static initializer.
      *
-     * VM will invoke the initializeSystemClass method to complete
-     * the initialization for this class separated from clinit.
-     * Note that to use properties set by the VM, see the constraints
-     * described in the initializeSystemClass method.
+     * The VM will invoke the initPhase1 method to complete the initialization
+     * of this class separate from <clinit>.
      */
     private static native void registerNatives();
     static {