Revert of [System Health] Create first System Health media user stories.

tools/perf/page_sets/data/system_health_desktop.json

 {
     "archives": {
         "system_health_desktop_000.wpr": [
             "load:search:amazon",
             "load:search:flipkart",
             "load:search:ebay",
             "load:search:yandex",
             "load:search:taobao",
             "load:search:yahoo",
             "load:search:baidu"
@@ skipping 79 matching lines @@
             "search:portal:google"
         ],
         "system_health_desktop_025.wpr": [
             "browse:media:imgur",
             "load:media:imgur"
         ],
         "system_health_desktop_026.wpr": [
             "browse:media:youtube"
         ],
         "system_health_desktop_028.wpr": [
-            "long_running:tools:gmail-foreground",
-            "long_running:tools:gmail-background"
-        ],
-        "system_health_desktop_030.wpr": [
-            "play:media:soundcloud",
-            "play:media:google_play_music"
-        ],
-        "system_health_desktop_032.wpr": [
-            "play:media:pandora"
+             "long_running:tools:gmail-foreground",
+             "long_running:tools:gmail-background"
         ]
     },
     "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating."
-}
+}