RFR: 8266937: Remove Compile::reshape_address

[Claes Redestad]

This method was introduced for aarch64 only in JDK-8154826 but the implementation was intentionally removed by JDK-8204348

The declarations and empty methods were left behind on all platforms, though.

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Commit messages:
 - Remove Compile::reshape_address

Changes: https://git.openjdk.java.net/jdk/pull/3988/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3988&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266937
  Stats: 20 lines in 7 files changed: 0 ins; 20 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3988.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3988/head:pull/3988

PR: https://git.openjdk.java.net/jdk/pull/3988