Revert of Add //components/signin/ios/browser:unit_tests to components_unittests.

components/BUILD.gn

Index: components/BUILD.gn
diff --git a/components/BUILD.gn b/components/BUILD.gn
index 505988d5b16859b4ed9f6ab2fdd5a4c836df541e..e4e2c61855327befc20f5c0111686ae6a7b8e04c 100644
--- a/components/BUILD.gn
+++ b/components/BUILD.gn
@@ -53,7 +53,6 @@
     "//components/pref_registry",
     "//components/omnibox/browser",
     "//components/infobars/core",
-    "//components/signin/core/browser",
     "//components/translate/core/browser",
     "//components/translate/core/common",
     "//components/version_ui",
@@ -134,6 +133,7 @@
       "//components/safe_browsing_db",
       "//components/search_provider_logos",
       "//components/security_interstitials/core",
+      "//components/signin/core/browser",
       "//components/ssl_config",
       "//components/startup_metric_utils/common",
       "//components/startup_metric_utils/browser",
@@ -228,7 +228,6 @@
       "//components/dom_distiller/ios",
       "//components/history/ios/browser",
       "//components/keyed_service/ios",
-      "//components/signin/ios/browser",
       "//components/translate/ios/browser",
       "//components/webp_transcode",
     ]
@@ -357,7 +356,6 @@
     "//components/search_engines:unit_tests",
     "//components/undo:unit_tests",
     "//components/leveldb_proto:unit_tests",
-    "//components/signin/core/browser:unit_tests",
     "//components/suggestions:unit_tests",
     "//components/translate/core/browser:unit_tests",
     "//components/translate/core/common:unit_tests",
@@ -431,6 +429,7 @@
       "//components/search_engines:unit_tests",
       "//components/search:unit_tests",
       "//components/search_provider_logos:unit_tests",
+      "//components/signin/core/browser:unit_tests",
       "//components/ssl_config:unit_tests",
       "//components/sync_bookmarks:unit_tests",
       "//components/sync_driver:unit_tests",
@@ -509,7 +508,6 @@
     }
   } else {
     deps += [
-      "//components/signin/ios/browser:unit_tests",
       "//components/translate/ios/browser:unit_tests",
       "//components/webp_transcode:unit_tests",
     ]