core: Remove ResourceRefreshPlannableTransformer

This transformer is no longer needed, as we are not transforming
scale-out resource nodes into plannable nodes anymore, but rather just
taking a different eval sequence for resource refresh nodes with no
state.

terraform/transform_resource_refresh_plannable.go

@@ -1,55 +0,0 @@
-package terraform
-
-import (
-	"fmt"
-	"log"
-)
-
-// ResourceRefreshPlannableTransformer is a GraphTransformer that replaces any
-// nodes that don't have state yet exist in config with
-// NodePlannableResourceInstance.
-//
-// This transformer is used when expanding count on managed resource nodes
-// during the refresh phase to ensure that data sources that have
-// interpolations that depend on resources existing in the graph can be walked
-// properly.
-type ResourceRefreshPlannableTransformer struct {
-	// The full global state.
-	State *State
-}
-
-// Transform implements GraphTransformer for
-// ResourceRefreshPlannableTransformer.
-func (t *ResourceRefreshPlannableTransformer) Transform(g *Graph) error {
-nextVertex:
-	for _, v := range g.Vertices() {
-		addr := v.(*NodeRefreshableManagedResourceInstance).Addr
-
-		// Find the state for this address, if there is one
-		filter := &StateFilter{State: t.State}
-		results, err := filter.Filter(addr.String())
-		if err != nil {
-			return err
-		}
-
-		// Check to see if we have a state for this resource. If we do, skip this
-		// node.
-		for _, result := range results {
-			if _, ok := result.Value.(*ResourceState); ok {
-				continue nextVertex
-			}
-		}
-		// If we don't, convert this resource to a NodePlannableResourceInstance node
-		// with all of the data we need to make it happen.
-		log.Printf("[TRACE] No state for %s, converting to NodePlannableResourceInstance", addr.String())
-		new := &NodePlannableResourceInstance{
-			NodeAbstractResource: v.(*NodeRefreshableManagedResourceInstance).NodeAbstractResource,
-		}
-		// Replace the node in the graph
-		if !g.Replace(v, new) {
-			return fmt.Errorf("ResourceRefreshPlannableTransformer: Could not replace node %#v with %#v", v, new)
-		}
-	}
-
-	return nil
-}