Revert "[maglev] Turn on fuzzing for --maglev"

This reverts commit b8b7a3a2.

Reason for revert:
https://crbug.com/1324097
https://crbug.com/v8/12859

Let's maybe only reland the clusterfuzz_trials part until the rest
is sorted out.

Original change's description:
> [maglev] Turn on fuzzing for --maglev
>
> Turn on fuzzing for Maglev to get additional test coverage.
>
> Bug: v8:7700
> Change-Id: I5b72d851639e31dff1bd91361cd81ad448c2d69e
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3629334
> Auto-Submit: Jakob Linke <jgruber@chromium.org>
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#80416}

Bug: v8:7700, chromium:1324097, v8:12859
Change-Id: I926319988c3b9a2bc6dd083c69691a6536838782
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3634963
Auto-Submit: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#80440}

tools/clusterfuzz/foozzie/v8_fuzz_flags.json

@@ -31,6 +31,5 @@
   [0.1, "--no-wasm-generic-wrapper"],
   [0.1, "--turbo-force-mid-tier-regalloc"],
   [0.0001, "--simulate-errors"],
-  [0.1, "--maglev"],
   [0.25, "--compact-maps"]
 ]

tools/clusterfuzz/trials/clusterfuzz_trials_config.json

@@ -6,7 +6,6 @@
     {"app_args": "--future", "app_name": "d8", "probability": 0.25},
     {"app_args": "--interrupt-budget=1000", "app_name": "d8", "probability": 0.25},
     {"app_args": "--jitless", "app_name": "d8", "probability": 0.1},
-    {"app_args": "--maglev", "app_name": "d8", "probability": 0.1},
     {"app_args": "--random-gc-interval=2000", "app_name": "d8", "probability": 0.05},
     {"app_args": "--noanalyze-environment-liveness", "app_name": "d8", "probability": 0.1},
     {"app_args": "--no-enable-avx", "app_name": "d8", "probability": 0.1},

tools/testrunner/testproc/fuzzer.py

@@ -20,7 +20,6 @@ EXTRA_FLAGS = [
     (0.2, '--future'),
     (0.1, '--interrupt-budget=100'),
     (0.1, '--liftoff'),
-    (0.1, '--maglev'),
     (0.2, '--no-analyze-environment-liveness'),
     # TODO(machenbach): Enable when it doesn't collide with crashing on missing
     # simd features.