Remove non-SP based setLockCredentialInternal()

This code is no longer used, since the migration to synthetic passwords
is always enabled.

Test: atest com.android.server.locksettings
Bug: 184723544
Change-Id: Ieefffb2641f5c12dfcd7556f529830328e8ba292
(cherry picked from commit 2dd97def291b392e85080ba9ab84734dd2bed8af)
Merged-In: Ieefffb2641f5c12dfcd7556f529830328e8ba292
1 file changed