RFR: 8205137: Remove Applet support from SwingSet2 [v4]

[Alisen Chung]

> removed support for running demo from applet for J2Ddemo and SwingSet2
> same PR as 8205137: Remove Applet support from SwingSet2 #5400 (changed branch name)

Alisen Chung has updated the pull request incrementally with one additional commit since the last revision:

  alphabetized imports

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5401/files
  - new: https://git.openjdk.java.net/jdk/pull/5401/files/fe3bde46..e03d6d54

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5401&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5401&range=02-03

  Stats: 194 lines in 17 files changed: 72 ins; 83 del; 39 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5401.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5401/head:pull/5401

PR: https://git.openjdk.java.net/jdk/pull/5401