[numfuzz] Remove jitless from flags experiment

Produces too many spurious errors with tests that normally get
skipped in jitless variant.

TBR=clemensb@chromium.org

No-Try: true
Change-Id: Iddf0e39e4c454a3b17568ba17a014e8d38922052
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1910107Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64889}

tools/testrunner/testproc/fuzzer.py

@@ -16,7 +16,6 @@ EXTRA_FLAGS = [
   (0.1, '--cache=code'),
   (0.1, '--force-slow-path'),
   (0.2, '--future'),
-  (0.1, '--jitless'),
   (0.1, '--liftoff'),
   (0.1, '--minor-mc'),
   (0.2, '--no-analyze-environment-liveness'),