remove old workflow file

.github/main.workflow

@@ -1,36 +0,0 @@
-workflow "test-and-deploy" {
-  on = "push"
-  resolves = "deploy"
-}
-
-action "install" {
-  uses = "docker://node:11.6.0"
-  args = "npm install"
-}
-
-action "test" {
-  uses = "docker://node:11.6.0"
-  args = "npm test"
-  needs = ["install"]
-}
-
-action "lint" {
-  uses = "./.github/actions/jshint"
-  needs = ["install"]
-}
-
-action "branch-filter" {
-  needs = ["test","lint"]
-  uses = "actions/bin/filter@master"
-  args = "branch master"
-}
-
-action "deploy" {
-  needs = ["branch-filter"]
-  uses = "actions/bin/sh@master"
-  args = ["env"]
-  secrets = ["PHONY_SECRET"]
-  env = {
-    PHONY_ENV = "foo"
-  }
-}