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

Revert of Reland "Add first part of the network_tester functionality" (patchset #3 id:40001 of https://codereview.webrtc.org/2808203003/ )

Reason for revert:
Hit infra. bug. which need to be fixed first.

Original issue's description:
> Reland "Add first part of the network_tester functionality"
> 
> BUG=webrtc:7426
> 
> Review-Url: https://codereview.webrtc.org/2808203003
> Cr-Commit-Position: refs/heads/master@{#17666}
> Committed: https://chromium.googlesource.com/external/webrtc/+/1c223b2f7557ff449add7a114d72ea97614731b5

TBR=stefan@webrtc.org,minyue@webrtc.org,nisse@webrtc.org,terelius@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7426

[michaelt, 2017-04-12 15:18:16]

The CQ bit was checked by michaelt@webrtc.org

[michaelt, 2017-04-12 15:18:16]

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

[commit-bot: I haz the power, 2017-04-12 15:18:19]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-04-12 15:18:26]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-04-12 15:18:27]

Failed to apply patch for resources/network_tester/client_config.dat.sha1:
While running git rm resources/network_tester/client_config.dat.sha1;
  fatal: pathspec 'resources/network_tester/client_config.dat.sha1' did not
match any files

Patch:  D    resources/network_tester/client_config.dat.sha1
Index: resources/network_tester/client_config.dat.sha1
diff --git a/resources/network_tester/client_config.dat.sha1
b/resources/network_tester/client_config.dat.sha1
deleted file mode 100644
index
925be43053b81401918e2d0afbef4cb800f73079..0000000000000000000000000000000000000000
--- a/resources/network_tester/client_config.dat.sha1
+++ /dev/null
@@ -1 +0,0 @@
-8a7265ba397c621574b321a451605ac94f58b1d3
\ No newline at end of file

[minyue-webrtc, 2017-04-12 15:20:50]

On 2017/04/12 15:18:27, commit-bot: I haz the power wrote:
> Failed to apply patch for resources/network_tester/client_config.dat.sha1:
> While running git rm resources/network_tester/client_config.dat.sha1;
>   fatal: pathspec 'resources/network_tester/client_config.dat.sha1' did not
> match any files
> 
> Patch:  D    resources/network_tester/client_config.dat.sha1
> Index: resources/network_tester/client_config.dat.sha1
> diff --git a/resources/network_tester/client_config.dat.sha1
> b/resources/network_tester/client_config.dat.sha1
> deleted file mode 100644
> index
>
925be43053b81401918e2d0afbef4cb800f73079..0000000000000000000000000000000000000000
> --- a/resources/network_tester/client_config.dat.sha1
> +++ /dev/null
> @@ -1 +0,0 @@
> -8a7265ba397c621574b321a451605ac94f58b1d3
> \ No newline at end of file

Please delete this CL. A revert was already made.