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

components/search_engines/search_terms_data.cc

Index: components/search_engines/search_terms_data.cc
diff --git a/components/search_engines/search_terms_data.cc b/components/search_engines/search_terms_data.cc
index be897db754e21d09333ba37dcae03712337eec83..f7300e4c9a5d39f6e9811872ed6466751b875c5a 100644
--- a/components/search_engines/search_terms_data.cc
+++ b/components/search_engines/search_terms_data.cc
@@ -54,10 +54,6 @@ std::string SearchTermsData::GetSuggestRequestIdentifier() const {
   return std::string();
 }
 
-bool SearchTermsData::IsShowingSearchTermsOnSearchResultsPages() const {
-  return false;
-}
-
 std::string SearchTermsData::InstantExtendedEnabledParam(
     bool for_search) const {
   return std::string();
@@ -68,14 +64,6 @@ std::string SearchTermsData::ForceInstantResultsParam(
   return std::string();
 }
 
-int SearchTermsData::OmniboxStartMargin() const {
-  return 0;
-}
-
-std::string SearchTermsData::NTPIsThemedParam() const {
-  return std::string();
-}
-
 std::string SearchTermsData::IOSWebViewTypeParam() const {
   return std::string();
 }