remove string-to-stream dep (getStream isn't called anywhere) (#4619)

* remove string-to-stream dep (getStream isn't called anywhere)

I don’t see ‘getStream’ being called anywhere in the code, this is the
only method that uses string-to-stream

* trigger status check

packages/server/lib/controllers/xhrs.coffee

@@ -1,6 +1,5 @@
 _           = require("lodash")
 mime        = require("mime")
-str         = require("string-to-stream")
 Promise     = require("bluebird")
 fixture     = require("../fixture")
 
@@ -79,13 +78,6 @@ module.exports = {
     .then (bytes) ->
       {data: bytes, encoding: encoding}
 
-  getStream: (resp) ->
-    if fixturesRe.test(resp)
-      @_get(resp).then (contents) ->
-        str(contents)
-    else
-      str(resp)
-
   getResponse: (resp, config) ->
     if fixturesRe.test(resp)
       @_get(resp, config)

packages/server/package.json

@@ -179,7 +179,6 @@
     "shell-env": "3.0.0",
     "signal-exit": "3.0.2",
     "sinon": "5.1.1",
-    "string-to-stream": "1.1.1",
     "strip-ansi": "3.0.1",
     "supports-color": "6.1.0",
     "syntax-error": "1.4.0",