RFR: 8205137: Remove Applet support from SwingSet2 [v3]

[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:

  8205137: Reverted accidental code reformat
  
  Reviewed-by: alichung

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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/25f7c533..fe3bde46

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5401&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5401&range=01-02

  Stats: 106 lines in 1 file changed: 16 ins; 16 del; 74 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