Remove nosse41 condition

This was added to try and skip tests when run on platforms without
sse41, but it doesn't work fuzz tests, since they add the flags on
command line. With https://crrev.com/c/2389982 we are now adding the
flag in the js test file itself.

Remove this condition since it's likely to be confusing and not work
correctly for all tests.

Bug: v8:10863
Change-Id: Ieeadade05dfc04ce250710d09a6a272775ce98c9
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2391321Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#69685}

tools/testrunner/base_runner.py

@@ -709,8 +709,6 @@ class BaseTestRunner(object):
       "verify_csa": self.build_config.verify_csa,
       "lite_mode": self.build_config.lite_mode,
       "pointer_compression": self.build_config.pointer_compression,
-      "nosse41": "--no-enable-sse4_1" in options.extra_flags or
-        "--noenable-sse4-1" in options.extra_flags
     }
 
   def _runner_flags(self):