shiny/example/font: delete this example.
shiny/example/font: delete this example.

It has been superseded by golang.org/x/image/example/font

Change-Id: Id60514c13a8ffae8bad0f12e14992a719ed7e548
Reviewed-on: https://go-review.googlesource.com/14303
Reviewed-by: David Symonds <7f6bb564ed9e580d4f0aa90d53b34578e5d24cb9@golang.org>

AkihiroSuda/golang-exp-aspectgo,golang/exp,JamesDunne/exp,AkihiroSuda/golang-exp-aspectgo,golang/exp,JamesDunne/exp,AkihiroSuda/golang-exp-aspectgo,golang/exp