Remove unused vendor github.com/stretchr/testify/require (#3273)

vendor/github.com/stretchr/testify/require/doc.go

@@ -1,28 +0,0 @@
-// Package require implements the same assertions as the `assert` package but
-// stops test execution when a test fails.
-//
-// Example Usage
-//
-// The following is a complete example using require in a standard test function:
-//    import (
-//      "testing"
-//      "github.com/stretchr/testify/require"
-//    )
-//
-//    func TestSomething(t *testing.T) {
-//
-//      var a string = "Hello"
-//      var b string = "Hello"
-//
-//      require.Equal(t, a, b, "The two words should be the same.")
-//
-//    }
-//
-// Assertions
-//
-// The `require` package have same global functions as in the `assert` package,
-// but instead of returning a boolean result they call `t.FailNow()`.
-//
-// Every assertion function also takes an optional string message as the final argument,
-// allowing custom error messages to be appended to the message the assertion method outputs.
-package require

vendor/github.com/stretchr/testify/require/forward_requirements.go

@@ -1,16 +0,0 @@
-package require
-
-// Assertions provides assertion methods around the
-// TestingT interface.
-type Assertions struct {
-	t TestingT
-}
-
-// New makes a new Assertions object for the specified TestingT.
-func New(t TestingT) *Assertions {
-	return &Assertions{
-		t: t,
-	}
-}
-
-//go:generate go run ../_codegen/main.go -output-package=require -template=require_forward.go.tmpl -include-format-funcs

vendor/github.com/stretchr/testify/require/require.go.tmpl

@@ -1,6 +0,0 @@
-{{.Comment}}
-func {{.DocInfo.Name}}(t TestingT, {{.Params}}) {
-	if !assert.{{.DocInfo.Name}}(t, {{.ForwardedParams}}) {
-		t.FailNow()
-	}
-}

vendor/github.com/stretchr/testify/require/require_forward.go.tmpl

@@ -1,4 +0,0 @@
-{{.CommentWithoutT "a"}}
-func (a *Assertions) {{.DocInfo.Name}}({{.Params}}) {
-	{{.DocInfo.Name}}(a.t, {{.ForwardedParams}})
-}

vendor/github.com/stretchr/testify/require/requirements.go

@@ -1,9 +0,0 @@
-package require
-
-// TestingT is an interface wrapper around *testing.T
-type TestingT interface {
-	Errorf(format string, args ...interface{})
-	FailNow()
-}
-
-//go:generate go run ../_codegen/main.go -output-package=require -template=require.go.tmpl -include-format-funcs