Remove test/webtests/PRESUBMIT.py
Remove test/webtests/PRESUBMIT.py

Most checks do not apply to devtools-frontend, or require dependencies

R=38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org

Change-Id: I8aa887b886856088697d9c2501bb851670db798b
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/1872588
Reviewed-by: Simon Zünd <38944668e9e2ca98ccd0275b53370f90fa55c113@chromium.org>
Commit-Queue: Yang Guo <1cf0af8245a3a17a632a2c73531392b0f9761c76@chromium.org>

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