[cleanup] Delete configs of deleted benchmarks

The benchmarks have already been deleted in https://crrev.com/c/1576030,
but there seem to be some leftover configs.

Bug: chromium:936998
Change-Id: I7968902a59e10ee82e02edca743ef3be93574587
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2132212Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755374}

tools/perf/core/test_data/benchmarks_to_shard.json

@@ -2159,18 +2159,6 @@
     ], 
     "name": "v8.runtime_stats.top_25"
   }, 
-  {
-    "repeat": 3, 
-    "stories": [
-      "AsmJsZenGarden", 
-      "WasmSpaceBuggy", 
-      "WasmStylizedRenderer", 
-      "WasmSunTemple", 
-      "WasmTanks", 
-      "WasmZenGarden"
-    ], 
-    "name": "wasm"
-  }, 
   {
     "repeat": 1, 
     "stories": [

tools/perf/core/test_data/test_timing_data.json

@@ -5595,30 +5595,6 @@
         "duration": "38.185777909090895",
         "name": "v8.runtime_stats.top_25/https://www.youtube.com/watch?v=_kZsOISarzg"
     },
-    {
-        "duration": "3.3975144354166667E-4",
-        "name": "wasm/AsmJsZenGarden"
-    },
-    {
-        "duration": "15.685649274410771",
-        "name": "wasm/WasmSpaceBuggy"
-    },
-    {
-        "duration": "65.75625318518516",
-        "name": "wasm/WasmStylizedRenderer"
-    },
-    {
-        "duration": "55.867687333333336",
-        "name": "wasm/WasmSunTemple"
-    },
-    {
-        "duration": "21.503581095959596",
-        "name": "wasm/WasmTanks"
-    },
-    {
-        "duration": "64.70462446127945",
-        "name": "wasm/WasmZenGarden"
-    },
     {
         "duration": "63.42066826262625",
         "name": "webrtc/10s_datachannel_transfer"