Revert "[baseline] Enable Concurrent Sparkplug on future"

This reverts commit 19bbd0f7.

Reason for revert: Fails on future bot - https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux64%20TSAN%20-%20no-concurrent-marking/6576/overview

Original change's description:
> [baseline] Enable Concurrent Sparkplug on future
>
> Bug: v8:12054
> Change-Id: I7bbd22067a9e98038a08ce5cb4b0ef494aadd651
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3289252
> Commit-Queue: Victor Gomes <victorgomes@chromium.org>
> Commit-Queue: Milad Fa <mfarazma@redhat.com>
> Auto-Submit: Victor Gomes <victorgomes@chromium.org>
> Reviewed-by: Milad Fa <mfarazma@redhat.com>
> Cr-Commit-Position: refs/heads/main@{#77986}

Bug: v8:12054
Change-Id: I97a511b00a79a606ac9abb6d15b707c75706deee
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3292095
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/main@{#77989}

src/flags/flag-definitions.h

@@ -712,12 +712,12 @@ DEFINE_BOOL_READONLY(concurrent_sparkplug, false,
 #else
 DEFINE_BOOL(concurrent_sparkplug, false,
             "compile Sparkplug code in a background thread")
-DEFINE_WEAK_IMPLICATION(future, concurrent_sparkplug)
 #endif
 #else
 DEFINE_BOOL(baseline_batch_compilation, false, "batch compile Sparkplug code")
 DEFINE_BOOL_READONLY(concurrent_sparkplug, false,
                      "compile Sparkplug code in a background thread")
+DEFINE_WEAK_IMPLICATION(future, concurrent_sparkplug)
 #endif
 DEFINE_STRING(sparkplug_filter, "*", "filter for Sparkplug baseline compiler")
 DEFINE_BOOL(sparkplug_needs_short_builtins, false,