shiny/driver/gldriver: remove display link timer

This is the shiny equivalent to https://golang.org/cl/15470

Change-Id: If2136919d3c532fca38e8cc8ecdb97266094c81f
Reviewed-on: https://go-review.googlesource.com/16879
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
4 files changed