remove lowercase sirupsen

vendor/github.com/sirupsen/logrus/appveyor.yml

@@ -1,14 +0,0 @@
-version: "{build}"
-platform: x64
-clone_folder: c:\gopath\src\github.com\sirupsen\logrus
-environment:  
-  GOPATH: c:\gopath
-branches:  
-  only:
-    - master
-install:  
-  - set PATH=%GOPATH%\bin;c:\go\bin;%PATH%
-  - go version
-build_script:  
-  - go get -t
-  - go test

vendor/github.com/sirupsen/logrus/terminal_check_notappengine.go

@@ -1,19 +0,0 @@
-// +build !appengine,!gopherjs
-
-package logrus
-
-import (
-	"io"
-	"os"
-
-	"golang.org/x/crypto/ssh/terminal"
-)
-
-func checkIfTerminal(w io.Writer) bool {
-	switch v := w.(type) {
-	case *os.File:
-		return terminal.IsTerminal(int(v.Fd()))
-	default:
-		return false
-	}
-}