gpu: remove unnecessary deps

protobuf_full deps is specified when use_protobuf_full = true in
proto_library template.
https://source.chromium.org/chromium/chromium/src/+/main:third_party/protobuf/proto_library.gni;l=600-602;drc=048301eab0b4e01c1526cd86ad44eee8a35d784c

So we don't need to have the dep in caller side.

Bug: b/366137880
Change-Id: I2f3561044ee67ee4b6436380d31be0821f867283
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5891576
Auto-Submit: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Colin Blundell <blundell@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1360425}