[GeometryInterface] Remove Constructor(DOMMatrixReadOnly).

it was removed in idl spec.

speclist:
https://drafts.fxtf.org/geometry/#DOMMatrix

BUG=388780, 660820

Review-Url: https://codereview.chromium.org/2478993002
Cr-Commit-Position: refs/heads/master@{#432772}
3 files changed