back out interfaces/unions, in preparation for new approach

generate/testdata/InterfaceNoFragments.graphql

@@ -1,10 +0,0 @@
-{
-  root {
-    id
-    name
-    children {
-      id
-      name
-    }
-  }
-}

generate/testdata/InterfaceNoFragments.graphql.go

@@ -1,10 +0,0 @@
-type Response struct {
-	Root struct {
-		Id       string `json:"id"`
-		Name     string `json:"name"`
-		Children []struct {
-			Id   string `json:"id"`
-			Name string `json:"name"`
-		} `json:"children"`
-	} `json:"root"`
-}

generate/testdata/SimpleFragment.graphql

@@ -1,11 +0,0 @@
-fragment profileData on User {
-  name
-  emails
-}
-
-query {
-  user {
-    id
-    ...profileData
-  }
-}

generate/testdata/SimpleFragment.graphql.go

@@ -1,11 +0,0 @@
-type Response struct {
-	User *struct {
-		Id string `json:"id"`
-		profileData
-	} `json:"user"`
-}
-
-type profileData struct {
-	Name   *string  `json:"name"`
-	Emails []string `json:"emails"`
-}

generate/testdata/UnionNoFragments.graphql

@@ -1,5 +0,0 @@
-{
-  randomLeaf {
-    __typename
-  }
-}

generate/testdata/UnionNoFragments.graphql.go

@@ -1,5 +0,0 @@
-type Response struct {
-	RandomLeaf struct {
-		Typename *string `json:"__typename"`
-	} `json:"randomLeaf"`
-}