Remove ClassFromField.

In preparation for removing the declaring class from ArtField.
CL generated with the help of gemini-cli.

Test: test.py
Bug: 481456995
Flag: com.android.art.rw.flags.jfield_id_change
Change-Id: I2e559c0650c652de0d1ded3d2670b5521c133512
2 files changed