Drop reference to webrtc_overrides/.../task_queue.h

rtc_base/BUILD.gn

Index: rtc_base/BUILD.gn
diff --git a/rtc_base/BUILD.gn b/rtc_base/BUILD.gn
index 31848df1f1601503e7ebec620a57ee94a1a3c088..10adc9503eea87ddf49c1ec0d92427fd5ddb326d 100644
--- a/rtc_base/BUILD.gn
+++ b/rtc_base/BUILD.gn
@@ -333,15 +333,9 @@ rtc_source_set("rtc_task_queue") {
 # provided implementation should be used. An external implementation should
 # depend on rtc_task_queue_api.
 rtc_source_set("rtc_task_queue_api") {
-  if (build_with_chromium) {
-    sources = [
-      "../../webrtc_overrides/rtc_base/task_queue.h",
-    ]
-  } else {
-    sources = [
-      "task_queue.h",
-    ]
-  }
+  sources = [
+    "task_queue.h",
+  ]
   deps = [
     ":rtc_base_approved",
   ]