Revert "[spc][bbk] Change BBK Deleter into an interface"

This reverts commit b08d38e4fd1f452deed0838bc62a80c275077382.

Reason for revert:
LUCI Bisection has identified this change as the culprit of a build failure. See the analysis: https://ci.chromium.org/ui/p/chromium/bisection/compile-analysis/b/8702195649948318529

Sample failed build: https://ci.chromium.org/b/8702195649948318529

If this is a false positive, please report it at http://b.corp.google.com/createIssue?component=1199205&description=Analysis%3A+https%3A%2F%2Fchromium-review.googlesource.com%2Fc%2Fchromium%2Fsrc%2F%2B%2F6990104&format=PLAIN&priority=P3&title=Wrongly+blamed+https%3A%2F%2Fci.chromium.org%2Fui%2Fp%2Fchromium%2Fbisection%2Fcompile-analysis%2Fb%2F8702195649948318529&type=BUG

Original change's description:
> [spc][bbk] Change BBK Deleter into an interface
>
> Changed the BBK deleter into and interface and moved Android
> implementation into a specific file. Also created a skeleton desktop
> implementation for a follow-up CL.
>
> Rename BrowserBoundKeysDeleter to BrowserBoundKeyDeleter for consistency
> with the other BBK files.
>
> Enabled BrowserBoundKeysDeleter on desktop platforms in
> ChromeBrowserMainExtraPartsProfiles and
> ChromeBrowsingDataRemoverDelegate.
>
> Bug: 441553136
> Change-Id: Id0cbac2a6c70c406fea471882ddfe1e6b2f350c5
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6990104
> Reviewed-by: Martin Šrámek <msramek@chromium.org>
> Reviewed-by: Alex Ilin <alexilin@chromium.org>
> Commit-Queue: Darwin Yang <darwinyang@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1523627}
>

Bug: 441553136
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I55840d752465aa16ab97dd3236ac44c7262d40a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7004200
Bot-Commit: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Owners-Override: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Commit-Queue: luci-bisection@appspot.gserviceaccount.com <luci-bisection@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1523723}