Remove expectations for benchmarks that no longer exist

Bug: chromium:973936
Change-Id: Ib0a9e1e878ad5903363a86359ce21f6562992e1f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1744662Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Commit-Queue: Rakib Hasan <rmhasan@google.com>
Cr-Commit-Position: refs/heads/master@{#685355}

tools/perf/expectations.config

@@ -105,7 +105,6 @@ crbug.com/702319 [ Nexus_5X ] blink_perf.shadow_dom/* [ Skip ]
 crbug.com/984578 [ Linux ] dromaeo/http://dromaeo.com?dom-modify [ Skip ]
 
 # Benchmark: dummy_benchmark
-crbug.com/848900 [ Win ] dummy_benchmark.histogram_benchmark_1/dummy_page.html [ Skip ]
 crbug.com/848900 [ Win ] dummy_benchmark.stable_benchmark_1/dummy_page.html [ Skip ]
 
 # Benchmark: blink_perf.svg
@@ -427,22 +426,9 @@ crbug.com/923116 [ Android ] v8.browsing_mobile-future/browse:shopping:avito [ S
 crbug.com/954949 [ Nexus5X_Webview ] v8.browsing_mobile-future/browse:news:washingtonpost [ Skip ]
 crbug.com/958336 [ Android ] v8.browsing_mobile-future/browse:shopping:flipkart [ Skip ]
 
-# Benchmark: v8.detached_context_age_in_gc
-crbug.com/770982 [ Win ] v8.detached_context_age_in_gc/Docs_(1_open_document_tab) [ Skip ]
-crbug.com/812618 [ Android_Webview ] v8.detached_context_age_in_gc/Docs_(1_open_document_tab) [ Skip ]
-
 # Benchmark: v8.runtime_stats.top_25
 crbug.com/954229 [ Mac ] v8.runtime_stats.top_25/* [ Skip ]
 
-# Benchmark: wasm
-crbug.com/814012 [ Mac ] wasm/AsmJsZenGarden [ Skip ]
-crbug.com/814012 [ Win ] wasm/AsmJsZenGarden [ Skip ]
-crbug.com/860570 [ Mac ] wasm/WasmStylizedRenderer [ Skip ]
-crbug.com/860570 [ Win ] wasm/WasmStylizedRenderer [ Skip ]
-crbug.com/860570 [ Mac ] wasm/WasmSunTemple [ Skip ]
-crbug.com/860570 [ Win ] wasm/WasmSunTemple [ Skip ]
-
-
 ##### Perf FYI benchmarks go after here #####
 # Benchmark: loading.desktop_layout_ng
 crbug.com/879833 [ Linux ] loading.desktop_layout_ng/Walgreens_cold [ Skip ]