RFR: 8260334: Remove deprecated sv_for_node_id() from Compile

[Xin Liu]

static member function sv_for_node_id() has moved to PhaseOutput. It is safe to 
remove the declaration from Compile. 
Also move the comment to PhaseOutput::sv_for_node_id(). 
Put both sv_for_node_id() and set_sv_for_object_node back to static.

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Commit messages:
 - 8260334: Remove deprecated sv_for_node_id() from Compile

Changes: https://git.openjdk.java.net/jdk/pull/2211/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2211&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260334
  Stats: 8 lines in 2 files changed: 1 ins; 3 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2211.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2211/head:pull/2211

PR: https://git.openjdk.java.net/jdk/pull/2211