Remove a variety of no-longer-used query params.

chrome/test/data/diagnostics/user/Default/Preferences

 {
    "browser": {
       "last_known_google_url": "https://www.google.com/",
       "last_prompted_google_url": "https://www.google.com/",
       "window_placement": {
          "bottom": 1559,
          "left": 2561,
          "maximized": false,
          "right": 3826,
          "top": 32,
          "work_area_bottom": 1574,
          "work_area_left": 0,
          "work_area_right": 2560,
          "work_area_top": 27
       }
    },
    "countryid_at_install": 21843,
    "default_apps_install_state": 3,
    "default_search_provider": {
       "alternate_urls": [ "{google:baseURL}#q={searchTerms}", "{google:baseURL}search#q={searchTerms}", "{google:baseURL}webhp#q={searchTerms}" ],
       "enabled": true,
       "encodings": "UTF-8",
       "icon_url": "http://www.google.com/favicon.ico",
       "id": "2",
-      "instant_url": "{google:baseURL}webhp?sourceid=chrome-instant&{google:RLZ}{google:forceInstantResults}{google:instantExtendedEnabledParameter}{google:ntpIsThemedParameter}{google:omniboxStartMarginParameter}ie={inputEncoding}",
+      "instant_url": "{google:baseURL}webhp?sourceid=chrome-instant&{google:RLZ}{google:forceInstantResults}{google:instantExtendedEnabledParameter}ie={inputEncoding}",
       "keyword": "google.com",
       "name": "Google",
       "prepopulate_id": "1",
       "search_terms_replacement_key": "espv",
       "search_url": "{google:baseURL}search?q={searchTerms}&{google:RLZ}{google:originalQueryForSuggestion}{google:assistedQueryStats}{google:searchFieldtrialParameter}{google:searchClient}{google:sourceId}{google:instantExtendedEnabledParameter}ie={inputEncoding}",
       "suggest_url": "{google:baseSuggestURL}search?{google:searchFieldtrialParameter}client=chrome&q={searchTerms}&{google:cursorPosition}{google:zeroPrefixUrl}sugkey={google:suggestAPIKeyParameter}"
    },
    "dns_prefetching": {
       "host_referral_list": [ 2, [ "https://accounts.google.com/", [ "https://accounts.youtube.com/", 2.2733802, "https://ssl.gstatic.com/", 2.2733802 ] ], [ "https://apis.google.com/", [ "https://apis.google.com/", 2.6037003999999997 ] ], [ "https://www.google.com/", [ "https://apis.google.com/", 2.9340205999999998, "https://fonts.googleapis.com/", 2.2733802, "https://ssl.google-analytics.com/", 2.6037003999999997, "https://ssl.gstatic.com/", 2.6037003999999997, "https://themes.googleusercontent.com/", 3.2643407999999994, "https://www.google.com/", 5.576582199999999 ] ] ],
       "startup_list": [ 1, "http://tools.google.com/", "https://accounts.google.com/", "https://accounts.youtube.com/", "https://clients2.google.com/", "https://clients2.googleusercontent.com/", "https://fonts.googleapis.com/", "https://ssl.google-analytics.com/", "https://ssl.gstatic.com/", "https://www.google.com/", "https://www.gstatic.com/" ]
@@ skipping 109 matching lines @@
       "local_profile_id": 2081500,
       "name": "First user"
    },
    "session": {
       "restore_on_startup_migrated": true
    },
    "sync_promo": {
       "startup_count": 1
    }
 }