(Fix landed) Revert of [CrOS Tether] Create HostScanCache, which caches scan results and inserts...

chromeos/components/tether/BUILD.gn

Index: chromeos/components/tether/BUILD.gn
diff --git a/chromeos/components/tether/BUILD.gn b/chromeos/components/tether/BUILD.gn
index 6ac6026f36901d3fc7662144442cc70d0cda5530..85dc49d02f0273374185f6ff9c3f5497562de553 100644
--- a/chromeos/components/tether/BUILD.gn
+++ b/chromeos/components/tether/BUILD.gn
@@ -24,8 +24,6 @@
     "connect_tethering_operation.h",
     "device_id_tether_network_guid_map.cc",
     "device_id_tether_network_guid_map.h",
-    "host_scan_cache.cc",
-    "host_scan_cache.h",
     "host_scan_device_prioritizer.cc",
     "host_scan_device_prioritizer.h",
     "host_scan_scheduler.cc",
@@ -92,8 +90,6 @@
     "fake_active_host.h",
     "fake_ble_connection_manager.cc",
     "fake_ble_connection_manager.h",
-    "fake_host_scan_cache.cc",
-    "fake_host_scan_cache.h",
     "fake_notification_presenter.cc",
     "fake_notification_presenter.h",
     "fake_tether_host_fetcher.cc",
@@ -133,7 +129,6 @@
     "ble_connection_manager_unittest.cc",
     "ble_scanner_unittest.cc",
     "connect_tethering_operation_unittest.cc",
-    "host_scan_cache_unittest.cc",
     "host_scan_device_prioritizer_unittest.cc",
     "host_scan_scheduler_unittest.cc",
     "host_scanner_operation_unittest.cc",