Removing deleted benchmarks from obbs shard map

Bug:855063
NOTRY=true
TBR=nednguyen@google.com

Cq-Include-Trybots: master.tryserver.chromium.perf:obbs_fyi
Change-Id: Ica527284a240bf2251e2a57c26729c541577aa44
Reviewed-on: https://chromium-review.googlesource.com/1124943Reviewed-by: Emily Hanley <eyaich@chromium.org>
Commit-Queue: Emily Hanley <eyaich@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572264}

tools/perf/core/shard_maps/benchmark_bot_map.json

@@ -5,9 +5,6 @@
       "blink_perf.owp_storage": {
         "end": 3
       },
-      "scheduler.tough_scheduling_cases": {
-        "end": 2
-      },
       "system_health.memory_mobile": {},
       "blink_perf.paint": {
         "end": 4
@@ -21,9 +18,6 @@
         "begin":3
       },
       "memory.top_10_mobile": {},
-      "scheduler.tough_scheduling_cases": {
-        "begin": 2
-      },
       "blink_perf.paint": {
         "begin": 4,
         "end": 10
@@ -35,8 +29,7 @@
       "blink_perf.paint": {
         "begin": 10
       },
-      "rasterize_and_record_micro.partial_invalidation": {},
-      "smoothness.tough_pinch_zoom_cases": {}
+      "rasterize_and_record_micro.partial_invalidation": {}
     }
   }
 }