vendor cleanup: remove unused,non-go and test files

vendor/github.com/modern-go/concurrent/.gitignore

@@ -1 +0,0 @@
-/coverage.txt

vendor/github.com/modern-go/concurrent/.travis.yml

@@ -1,14 +0,0 @@
-language: go
-
-go:
-  - 1.8.x
-  - 1.x
-
-before_install:
-  - go get -t -v ./...
-
-script:
-  - ./test.sh
-
-after_success:
-  - bash <(curl -s https://codecov.io/bash)

vendor/github.com/modern-go/concurrent/README.md

@@ -1,49 +0,0 @@
-# concurrent
-
-[![Sourcegraph](https://sourcegraph.com/github.com/modern-go/concurrent/-/badge.svg)](https://sourcegraph.com/github.com/modern-go/concurrent?badge)
-[![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](http://godoc.org/github.com/modern-go/concurrent)
-[![Build Status](https://travis-ci.org/modern-go/concurrent.svg?branch=master)](https://travis-ci.org/modern-go/concurrent)
-[![codecov](https://codecov.io/gh/modern-go/concurrent/branch/master/graph/badge.svg)](https://codecov.io/gh/modern-go/concurrent)
-[![rcard](https://goreportcard.com/badge/github.com/modern-go/concurrent)](https://goreportcard.com/report/github.com/modern-go/concurrent)
-[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://raw.githubusercontent.com/modern-go/concurrent/master/LICENSE)
-
-* concurrent.Map: backport sync.Map for go below 1.9
-* concurrent.Executor: goroutine with explicit ownership and cancellable
-
-# concurrent.Map
-
-because sync.Map is only available in go 1.9, we can use concurrent.Map to make code portable
-
-```go
-m := concurrent.NewMap()
-m.Store("hello", "world")
-elem, found := m.Load("hello")
-// elem will be "world"
-// found will be true
-```
-
-# concurrent.Executor
-
-```go
-executor := concurrent.NewUnboundedExecutor()
-executor.Go(func(ctx context.Context) {
-    everyMillisecond := time.NewTicker(time.Millisecond)
-    for {
-        select {
-        case <-ctx.Done():
-            fmt.Println("goroutine exited")
-            return
-        case <-everyMillisecond.C:
-            // do something
-        }
-    }
-})
-time.Sleep(time.Second)
-executor.StopAndWaitForever()
-fmt.Println("executor stopped")
-```
-
-attach goroutine to executor instance, so that we can
-
-* cancel it by stop the executor with Stop/StopAndWait/StopAndWaitForever
-* handle panic by callback: the default behavior will no longer crash your application

vendor/github.com/modern-go/concurrent/map_test.go

@@ -1,18 +0,0 @@
-package concurrent_test
-
-import (
-	"github.com/modern-go/concurrent"
-	"testing"
-)
-
-func TestMap_Load(t *testing.T) {
-	m := concurrent.NewMap()
-	m.Store("hello", "world")
-	value, found := m.Load("hello")
-	if !found {
-		t.Fail()
-	}
-	if value != "world" {
-		t.Fail()
-	}
-}

vendor/github.com/modern-go/concurrent/test.sh

@@ -1,12 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-echo "" > coverage.txt
-
-for d in $(go list ./... | grep -v vendor); do
-    go test -coverprofile=profile.out -coverpkg=github.com/modern-go/concurrent $d
-    if [ -f profile.out ]; then
-        cat profile.out >> coverage.txt
-        rm profile.out
-    fi
-done

vendor/github.com/modern-go/concurrent/unbounded_executor_test.go

@@ -1,54 +0,0 @@
-package concurrent_test
-
-import (
-	"context"
-	"fmt"
-	"time"
-	"github.com/modern-go/concurrent"
-)
-
-func ExampleUnboundedExecutor_Go() {
-	executor := concurrent.NewUnboundedExecutor()
-	executor.Go(func(ctx context.Context) {
-		fmt.Println("abc")
-	})
-	time.Sleep(time.Second)
-	// output: abc
-}
-
-func ExampleUnboundedExecutor_StopAndWaitForever() {
-	executor := concurrent.NewUnboundedExecutor()
-	executor.Go(func(ctx context.Context) {
-		everyMillisecond := time.NewTicker(time.Millisecond)
-		for {
-			select {
-			case <-ctx.Done():
-				fmt.Println("goroutine exited")
-				return
-			case <-everyMillisecond.C:
-				// do something
-			}
-		}
-	})
-	time.Sleep(time.Second)
-	executor.StopAndWaitForever()
-	fmt.Println("executor stopped")
-	// output:
-	// goroutine exited
-	// executor stopped
-}
-
-func ExampleUnboundedExecutor_Go_panic() {
-	concurrent.HandlePanic = func(recovered interface{}, funcName string) {
-		fmt.Println(funcName)
-	}
-	executor := concurrent.NewUnboundedExecutor()
-	executor.Go(willPanic)
-	time.Sleep(time.Second)
-	// output:
-	// github.com/modern-go/concurrent_test.willPanic
-}
-
-func willPanic(ctx context.Context) {
-	panic("!!!")
-}