vendor: delete

The vendor directory in this repository is quite old and got out of sync
with the module versions selected via go.mod file. The versions selected
in go.mod are good for use, so this CL resolves the conflict by removing
the vendor directory.

Fixes golang/go#37738.

Change-Id: Icf8b022db4c3d03d5300c796e86906683f9525e4
Reviewed-on: https://go-review.googlesource.com/c/perf/+/222540
Run-TryBot: Dmitri Shuralyov <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Trust: Dmitri Shuralyov <[email protected]>
Reviewed-by: Bryan C. Mills <[email protected]>

Author: dmitshur

README.md

@@ -32,8 +32,8 @@ tools to be written against the API. A client can be found in the
 
 ## Download/Install
 
-The easiest way to install is to run `go get -u golang.org/x/perf/cmd/...`. You can
-also manually git clone the repository to `$GOPATH/src/golang.org/x/perf`.
+The easiest way to install is to run `go get golang.org/x/perf/cmd/...`.
+You can also manually git clone the repository and run `go install ./cmd/...`.
 
 ## Report Issues / Send Patches