[code-reflection] RFR: Remove the code model transformation: addVarsWhenNecessary. [v3]

[Mourad Abbay]

> We remove the code model transformation: `addVarsWhenNecessary`.

Mourad Abbay has updated the pull request incrementally with one additional commit since the last revision:

  Simplify CodeModelToAST.exprTree

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Changes:
  - all: https://git.openjdk.org/babylon/pull/387/files
  - new: https://git.openjdk.org/babylon/pull/387/files/cae6c352..66ad9bf2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=babylon&pr=387&range=02
 - incr: https://webrevs.openjdk.org/?repo=babylon&pr=387&range=01-02

  Stats: 2 lines in 1 file changed: 0 ins; 2 del; 0 mod
  Patch: https://git.openjdk.org/babylon/pull/387.diff
  Fetch: git fetch https://git.openjdk.org/babylon.git pull/387/head:pull/387

PR: https://git.openjdk.org/babylon/pull/387