Revert "Increase renderer process limit"

This reverts commit a98ff564ae71a3cc99e1ba65e2f45f0ab9c6e1ba.

Reason for revert: Request in b/502750951

Original change's description:
> Increase renderer process limit
>
> When Native Zygote services are used, it's possible to utilize more
> than the previous maximum of 98 processes. Conditionally allow this,
> in cases when SafeSetID() is available and Native Zygote services
> are enabled.
>
> Starting with a modest increase to the limit, to mitigate the risk
> of side-effects that are difficult to find in initial testing.
>
> Bug: 485871167
> Test: verified creating >100 renderer processes on brya device.
> Change-Id: Ic71897b9cffd2aae2eba79ffb9347d1231cd9546
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7667069
> Auto-Submit: Ben Scarlato <akhna@google.com>
> Reviewed-by: Ryan Borzello <rborzello@google.com>
> Commit-Queue: Ben Scarlato <akhna@google.com>
> Reviewed-by: Bo Liu <boliu@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1601629}

Bug: 485871167
Change-Id: Iada8908660425ce201eca4f20e37a71e9cbac1d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7764733
Commit-Queue: Ben Scarlato <akhna@google.com>
Reviewed-by: Bo Liu <boliu@chromium.org>
Reviewed-by: Ryan Borzello <rborzello@google.com>
Cr-Commit-Position: refs/heads/main@{#1615307}