Revert "OpenJDK 11: Add String.repeat()"

This reverts commit d1da3ae0aa3ddde0b129364b5e1c6073f7bdb7b7.

Reason for revert: breakage in b/203790937
Bug: 203790937
Bug: 202962059
Test: treehugger

Change-Id: I07b6fbfe79a599abd9aa98a1dcab918a74d4b816
5 files changed