JDK25 will remove Java security manager. Code cleanup...

[ludoch]

Since Java8 new gVisor sandbox, we removed a lot of code using the obsolete java security manager.

We still have some leftover that we might want to cleanup before testing with JDK25 later in 2025.

Also code using AccessController.doPrivileged(...) should be evaluated to complete deletion of java.security imports.

[ludoch]

Other warnings I see is about Character class:

/appengine_standard/api_dev/src/main/java/com/google/appengine/api/search/dev/WordSeparatorAnalyzer.java:78: warning: [removal] Character(char) in Character has been deprecated and marked for removal
return !LuceneUtils.WORD_SEPARATORS.contains(new Character(c));

[ludoch]

In general, we should try to remove as much as possible build warnings like "has been deprecated and marked for removal"

Some might not be possible yet