[foozzie] Remove async suppressions

NOTRY=true
TBR=gsathya@chromium.org

Bug: chromium:800651
Change-Id: I9e978c430cbeef0fcf004d1cfbd1e64f15983155
Reviewed-on: https://chromium-review.googlesource.com/933294Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51490}

tools/clusterfuzz/v8_suppressions.py

@@ -72,14 +72,6 @@ IGNORE_SOURCES = {
 # label.
 # Regular expressions are assumed to be compiled. We use regexp.search.
 IGNORE_TEST_CASES = {
-  'slow_path': {
-    'crbug.com/800651':
-        re.compile(r'async', re.S),
-  },
-  'slow_path_opt': {
-    'crbug.com/800651':
-        re.compile(r'async', re.S),
-  },
 }
 
 # Ignore by output pattern. Map from config->bug->regexp. See IGNORE_TEST_CASES