Remove bundled DevTools frontend

We now use the external version pulled via DEPS.

[email protected]

Bug: 1011259
Change-Id: If34101d2f9a1fe82e3e96fb3b616a082cd2abaca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1893272
Commit-Queue: Yang Guo <[email protected]>
Reviewed-by: Rick Byers <[email protected]>
Reviewed-by: Ben Mason <[email protected]>
Cr-Original-Commit-Position: refs/heads/master@{#712057}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: f5b160acfe5dfdaacc020bd0922d5eeb65ef0a7c
1324 files changed
tree: 4b825dc642cb6eb9a060e54bf8d69288fbee4904

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