ART: Clean up MethodVerifier

Remove unused methods. Move internal methods to be private.

(cherry picked from commit 51de69ecd20c1c9bad441359a07582d1bfa26905)

Bug: 130904871
Test: mmma art
Test: m test-art-host
Merged-In: I3b1a6a4495e3ddc4507881659d2c6d6d6049e8f6
Change-Id: I3b1a6a4495e3ddc4507881659d2c6d6d6049e8f6
3 files changed