Bug 1564758 [wpt PR 17654] - [Native File System] Remove remove and r…

…emoveRecursively operations, a=testonly

Automatic update from web-platform-tests
[Native File System] Remove remove and removeRecursively operations

These operations are no longer part of the spec. This CL removes their
implementation.

Bug: 968553
Change-Id: If2600a55bd724bf2fee537b36a3bece8fd5c1313
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1680173
Commit-Queue: Eero Häkkinen <eero.hakkinenintel.com>
Reviewed-by: Marijn Kruisselbrink <mekchromium.org>
Reviewed-by: Chris Palmer <palmerchromium.org>
Cr-Commit-Position: refs/heads/master{#674922}

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wpt-commits: 8327a0378e5cbd6f31db6511bd2f4707ca2b1c20
wpt-pr: 17654

UltraBlame original commit: 64879d77d7aa3d72baed210b5930923e1761f63c