[Remote suggestions] Clean up variation params in the fetcher.

components/ntp_snippets/remote/json_request_unittest.cc

Index: components/ntp_snippets/remote/json_request_unittest.cc
diff --git a/components/ntp_snippets/remote/json_request_unittest.cc b/components/ntp_snippets/remote/json_request_unittest.cc
index 909f7cc32c66235bd9b0925f02263d99e20fc15e..d0bdad334b52953f3faca6616bdefbe10b3d7f41 100644
--- a/components/ntp_snippets/remote/json_request_unittest.cc
+++ b/components/ntp_snippets/remote/json_request_unittest.cc
@@ -129,9 +129,6 @@ TEST_F(JsonRequestTest, BuildRequestAuthenticated) {
                          "  \"obfuscated_gaia_id\": \"0BFUSGAIA\","
                          "  \"advanced_options\": {"
                          "    \"local_scoring_params\": {"
-                         "      \"content_params\": {"
-                         "        \"only_return_personalized_results\": true"
-                         "      },"
                          "      \"content_restricts\": ["
                          "        {"
                          "          \"type\": \"METADATA\","
@@ -184,9 +181,6 @@ TEST_F(JsonRequestTest, BuildRequestUnauthenticated) {
                          "  \"response_detail_level\": \"STANDARD\","
                          "  \"advanced_options\": {"
                          "    \"local_scoring_params\": {"
-                         "      \"content_params\": {"
-                         "        \"only_return_personalized_results\": false"
-                         "      },"
                          "      \"content_restricts\": ["
                          "        {"
                          "          \"type\": \"METADATA\","