Remove declaration of non-existent constructor

BUG=skia:

Change-Id: If60588d5b6e960f2fb89cc24296cea7606fa189a
Reviewed-on: https://skia-review.googlesource.com/8324
Commit-Queue: Matt Sarett <msarett@google.com>
Reviewed-by: Matt Sarett <msarett@google.com>
1 file changed