Revert "dev/gqltest: Add back repo:deps integration test (#32140)"

Created by: rvantonder

This reverts commit b6bdeaec60e90e11453d0ba4cc85c98e5abc4f5e.

Flaking on main:

• https://buildkite.com/sourcegraph/sourcegraph/builds/135037#ce8357b7-a117-40a9-a2ab-b8cee9732b4f/364-366
• https://buildkite.com/sourcegraph/sourcegraph/builds/135037#ce8357b7-a117-40a9-a2ab-b8cee9732b4f/364-366

Test plan

It's a revert