remove some unused code

src/compile/nodes/Binding.ts

@@ -7,7 +7,6 @@ export default class Binding extends Node {
 	name: string;
 	expression: Expression;
 	isContextual: boolean;
-	usesContext: boolean;
 	obj: string;
 	prop: string;
 
@@ -34,13 +33,9 @@ export default class Binding extends Node {
 			prop = `[✂${this.expression.node.property.start}-${this.expression.node.property.end}✂]`;
 			if (!this.expression.node.computed) prop = `'${prop}'`;
 			obj = `[✂${this.expression.node.object.start}-${this.expression.node.object.end}✂]`;
-
-			this.usesContext = true;
 		} else {
 			obj = 'ctx';
 			prop = `'${name}'`;
-
-			this.usesContext = scope.names.has(name);
 		}
 
 		this.obj = obj;

src/compile/render-dom/wrappers/Element/index.ts

@@ -137,25 +137,11 @@ export default class ElementWrapper extends Wrapper {
 			return new AttributeWrapper(this, block, attribute);
 		});
 
-		let has_bindings;
-		const binding_lookup = {};
-		this.node.bindings.forEach(binding => {
-			binding_lookup[binding.name] = binding;
-			has_bindings = true;
-		});
-
-		const type = this.node.getStaticAttributeValue('type');
-
 		// ordinarily, there'll only be one... but we need to handle
 		// the rare case where an element can have multiple bindings,
 		// e.g. <audio bind:paused bind:currentTime>
 		this.bindings = this.node.bindings.map(binding => new Binding(block, binding, this));
 
-		// TODO remove this, it's just useful during refactoring
-		if (has_bindings && !this.bindings.length) {
-			throw new Error(`no binding was created`);
-		}
-
 		if (node.intro || node.outro) {
 			if (node.intro) block.addIntro();
 			if (node.outro) block.addOutro();
@@ -785,10 +771,6 @@ export default class ElementWrapper extends Wrapper {
 		return null;
 	}
 
-	isMediaNode() {
-		return this.node.name === 'audio' || this.node.name === 'video';
-	}
-
 	remount(name: string) {
 		const slot = this.attributes.find(attribute => attribute.node.name === 'slot');
 		if (slot) {