[tests] Skip webkit/dfg-inline-function-dot-caller on debug simulators

This test takes over 8 minutes to run on arm64 debug.

Also removed redundant skips for another DFG test.

Change-Id: I9c66c90fb3dc5c42ca04010e2d0245626a867ebd
Reviewed-on: https://chromium-review.googlesource.com/c/1321037Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57303}

test/webkit/webkit.status

@@ -60,9 +60,10 @@
   # Skip tests that are too slow for simulators.
   'dfg-int-overflow-in-loop': [SKIP],
 }],  # 'simulator_run'
-['arch == arm64 and simulator_run', {
-  'dfg-int-overflow-in-loop': [SKIP],
-}],  # 'arch == arm64 and simulator_run'
+['mode == debug and simulator_run', {
+  # Too slow on debug simulators.
+  'dfg-inline-function-dot-caller': [SKIP],
+}],  # 'mode == debug and simulator_run'
 ['dcheck_always_on == True and (arch == arm or arch == arm64)', {
   # Doesn't work with gcc 4.6 on arm or arm64 for some reason.
   'reentrant-caching': [SKIP],
@@ -71,14 +72,6 @@
   # Too slow for mips big-endian boards on bots (no FPU).
   'dfg-int-overflow-in-loop': [SKIP],
 }], # 'arch == mips'
-['(arch == mips64 or arch == mips64el) and simulator_run', {
-  # Too slow.
-  'dfg-int-overflow-in-loop': [SKIP],
-}], # '(arch == mips64 or arch == mips64el) and simulator_run'
-['(arch == ppc or arch == ppc64) and simulator_run', {
-  # Too slow.
-  'dfg-int-overflow-in-loop': [SKIP],
-}], # 'arch == ppc or arch == ppc64'
 ['arch == s390 or arch == s390x', {
   # Too slow.
   'dfg-int-overflow-in-loop': [SKIP],