The ClassLoaderData::_is_unsafe_anonymous field is unused in the SA

The SA doesn't call this function, so doesn't use the field exported from the ClassLoaderData:

- public boolean getisUnsafeAnonymous() {
- return isUnsafeAnonymousField.getValue(this) != 0;
- }
-
This should be removed. This information is available in gdb and doesn't require SA access.

This is being changed by the upcoming hidden classes work.