Extensions: SignedInDevices: Remove API

Bug: 1015619

Change-Id: I3c294ccc7e84770d226545a4281287273e3528b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2816838
Reviewed-by: danakj <danakj@chromium.org>
Reviewed-by: Devlin Cronin <rdevlin.cronin@chromium.org>
Commit-Queue: Solomon Kinard <solomonkinard@chromium.org>
Reviewed-by: David Bertoni <dbertoni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1001499}

chrome/app/generated_resources.grd

@@ -4602,9 +4602,6 @@ are declared in tools/grit/grit_rule.gni.
         <message name="IDS_EXTENSION_PROMPT_WARNING_PRIVACY" desc="Permission string for access to privacy settings.">
           Change your privacy-related settings
         </message>
-        <message name="IDS_EXTENSION_PROMPT_WARNING_SIGNED_IN_DEVICES" desc="Permission string for access to privacy settings.">
-          Read the list of your signed-in devices
-        </message>
         <message name="IDS_EXTENSION_PROMPT_WARNING_DOWNLOADS" desc="Permission string for access to downloads.">
           Manage your downloads
         </message>

chrome/browser/extensions/BUILD.gn

@@ -336,12 +336,6 @@ static_library("extensions") {
     "api/settings_private/settings_private_event_router.h",
     "api/settings_private/settings_private_event_router_factory.cc",
     "api/settings_private/settings_private_event_router_factory.h",
-    "api/signed_in_devices/id_mapping_helper.cc",
-    "api/signed_in_devices/id_mapping_helper.h",
-    "api/signed_in_devices/signed_in_devices_api.cc",
-    "api/signed_in_devices/signed_in_devices_api.h",
-    "api/signed_in_devices/signed_in_devices_manager.cc",
-    "api/signed_in_devices/signed_in_devices_manager.h",
     "api/storage/managed_value_store_cache.cc",
     "api/storage/managed_value_store_cache.h",
     "api/storage/policy_value_store.cc",