Remove setVsyncPeriod()

... as this should come from active config. The one existing
use case in HostComposer would attempt to set the vsync period
based on drm properties but that was already after the vsync
thread had started.

Bug: b/201578179
Test: launch_cvd
Change-Id: I704ae1a21bacfdc111b79620600a7954aa27eb63
Merged-In: I704ae1a21bacfdc111b79620600a7954aa27eb63
3 files changed