style-directives: actually, remove StyleDirective interface entriely

src/compiler/interfaces.ts

@@ -41,16 +41,12 @@ interface BaseDirective extends BaseNode {
 	modifiers: string[];
 }
 
-export interface Transition extends BaseDirective{
+export interface Transition extends BaseDirective {
 	type: 'Transition';
 	intro: boolean;
 	outro: boolean;
 }
 
-export interface StyleDirective extends BaseDirective {
-	type: 'Style';
-}
-
 export type Directive = BaseDirective | Transition;
 
 export type TemplateNode = Text