Cleanup BUILD.gn files from imports like foo:foo

Repalce all occurrences of foo:foo in deps with just foo in BUILD.gn
files.

Done with Sublime regex replace.
Find: \b([-a-zA-Z0-9_]+):+\1\b
In: *.gn
Replace with: \1

Bug: None
Change-Id: I40aba1b14face687a595b852ffe443cb20197611
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/127899
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27225}
diff --git a/rtc_tools/BUILD.gn b/rtc_tools/BUILD.gn
index 7bdda7d..6269f4c 100644
--- a/rtc_tools/BUILD.gn
+++ b/rtc_tools/BUILD.gn
@@ -183,7 +183,7 @@
       "../logging:rtc_event_log_impl_base",
       "../media:rtc_audio_video",
       "../media:rtc_media_base",
-      "../rtc_base:rtc_base",
+      "../rtc_base",
       "../rtc_base:rtc_base_approved",
       "../rtc_base:rtc_json",
       "../rtc_base/system:file_wrapper",
@@ -418,7 +418,7 @@
       "../api:scoped_refptr",
       "../api/video:video_frame",
       "../api/video:video_frame_i420",
-      "../common_video:common_video",
+      "../common_video",
       "../rtc_base",
       "../rtc_base:checks",
       "../test:fileutils",
diff --git a/rtc_tools/network_tester/BUILD.gn b/rtc_tools/network_tester/BUILD.gn
index aa53c5a..151f9a7 100644
--- a/rtc_tools/network_tester/BUILD.gn
+++ b/rtc_tools/network_tester/BUILD.gn
@@ -45,13 +45,13 @@
       ":network_tester_packet_proto",
       "../../api/task_queue",
       "../../p2p",
+      "../../rtc_base",
       "../../rtc_base:checks",
       "../../rtc_base:protobuf_utils",
-      "../../rtc_base:rtc_base",
       "../../rtc_base:rtc_base_approved",
       "../../rtc_base:rtc_task_queue",
       "../../rtc_base:sequenced_task_checker",
-      "../../rtc_base/third_party/sigslot:sigslot",
+      "../../rtc_base/third_party/sigslot",
       "//third_party/abseil-cpp/absl/memory",
       "//third_party/abseil-cpp/absl/types:optional",
     ]