Revert "webview: implement new minimum version check."

This reverts commit f566a8b94c45078ba7fda5f99e906db5f470bb34.

Reason for revert: We plan to use a different approach for the compatibility check using a new flag name, as we're no longer planning to have an OS-version-specific entry point. The flag is not enabled on any configuration.

Bug: 373617389
Test: atest CtsWebkitTestCases
Test: atest WebViewUpdateServiceTest
Flag: EXEMPT removing android.webkit.use_b_entry_point
Change-Id: I25e43b347cbf33a83e8b70d9fa4e25ff75d8fc5a
3 files changed