Revert of Upstream Chrome on iOS source code [11/11].

ios/chrome/browser/ui/elements/BUILD.gn

Index: ios/chrome/browser/ui/elements/BUILD.gn
diff --git a/ios/chrome/browser/ui/elements/BUILD.gn b/ios/chrome/browser/ui/elements/BUILD.gn
index 2eb19d630576ffb361094044c0a19ac49f4bad6d..4a287e83f96dbcfaaebeb0748f95930b39020a4c 100644
--- a/ios/chrome/browser/ui/elements/BUILD.gn
+++ b/ios/chrome/browser/ui/elements/BUILD.gn
@@ -22,33 +22,14 @@
 source_set("unit_tests") {
   testonly = true
   sources = [
-    "activity_overlay_coordinator_unittest.mm",
     "selector_coordinator_unittest.mm",
     "selector_picker_view_controller_unittest.mm",
   ]
   deps = [
     ":elements",
-    ":elements_internal",
     "//base",
     "//base/test:test_support",
     "//testing/gtest",
     "//third_party/ocmock",
   ]
 }
-
-source_set("elements_internal") {
-  sources = [
-    "activity_overlay_coordinator.h",
-    "activity_overlay_coordinator.mm",
-    "activity_overlay_view_controller.h",
-    "activity_overlay_view_controller.mm",
-  ]
-  deps = [
-    "//base",
-    "//ios/chrome/browser",
-    "//ios/chrome/browser/ui",
-    "//ios/chrome/browser/ui/material_components",
-    "//ios/third_party/material_components_ios",
-  ]
-  libs = [ "UIKit.framework" ]
-}