Revert of Reland "Add first part of the network_tester functionality"

webrtc/tools/network_tester/network_tester_packet.proto

Index: webrtc/tools/network_tester/network_tester_packet.proto
diff --git a/webrtc/tools/network_tester/network_tester_packet.proto b/webrtc/tools/network_tester/network_tester_packet.proto
deleted file mode 100644
index c3bcec5ec7003edbbfadc8fd60312e67db984d1e..0000000000000000000000000000000000000000
--- a/webrtc/tools/network_tester/network_tester_packet.proto
+++ /dev/null
@@ -1,18 +0,0 @@
-syntax = "proto2";
-option optimize_for = LITE_RUNTIME;
-package webrtc.network_tester.packet;
-
-message NetworkTesterPacket {
-  enum Type {
-    HAND_SHAKING = 0;
-    TEST_START = 1;
-    TEST_DATA = 2;
-    TEST_DONE = 3;
-  }
-
-  optional Type type = 1;
-  optional int64 send_timestamp = 2;
-  optional int64 arrival_timestamp = 3;
-  optional int64 sequence_number = 4;
-  optional int32 packet_size = 5;
-}