Bytecode generation already emits a manual runtime call for
CreateFunctionContext in the case where the slot count exceeds the
maximum, so we don't need to check for this case in Sparkplug.

Change-Id: I228bc710c5093f7c752dc7bda7912e3af1547371
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3755118
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Auto-Submit: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#81645}