RFR: 8340326: Remove references to Applet in core-libs/security tests [v4]

[Justin Lu]

> Please review this PR which removes usages of Applet within the corelibs tests.
> 
> Most changes are removed comments/updated var names. The JBS issue lists more files than the ones included in this pull request, please see the comment on the JBS issue for the reason why they were not included.
> 
> The following files were removed,
> 
> - test/jdk/java/util/TimeZone/DefaultTimeZoneTest.html
>   - Test runner is no longer an Applet, so not needed
> - test/jdk/sun/net/www/ParseUtil_6380332.java
>   - Outdated test that checks a SunTea applet
> - test/jdk/java/net/Socket/SocketImplTest.java
>   - An old Applet test missing Jtreg tags.

Justin Lu has updated the pull request incrementally with one additional commit since the last revision:

  review: update wording of instructions

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/21096/files
  - new: https://git.openjdk.org/jdk/pull/21096/files/6b2c060b..603e40fa

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21096&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21096&range=02-03

  Stats: 10 lines in 1 file changed: 0 ins; 2 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/21096.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21096/head:pull/21096

PR: https://git.openjdk.org/jdk/pull/21096