remove has_arg

src/compiler/compile/nodes/Binding.ts

@@ -31,7 +31,6 @@ export default class Binding extends Node {
 	raw_expression: ESTreeNode; // TODO exists only for bind:this — is there a more elegant solution?
 	is_contextual: boolean;
 	is_readonly: boolean;
-	has_arg: boolean;
 
 	constructor(component: Component, parent: Element | InlineComponent | Window, scope: TemplateScope, info: TemplateNode) {
 		super(component, parent, scope, info);
@@ -91,8 +90,6 @@ export default class Binding extends Node {
 			(isElement(parent) &&
 				((parent.is_media_node() && read_only_media_attributes.has(this.name)) ||
 					(parent.name === 'input' && type === 'file')) /* TODO others? */);
-
-		this.has_arg = sizing.test(this.name);
 	}
 
 	is_readonly_media_attribute() {

src/compiler/compile/render_dom/wrappers/Element/Binding.ts

@@ -26,7 +26,6 @@ export default class BindingWrapper {
 	};
 	snippet: Node;
 	is_readonly: boolean;
-	has_arg: boolean;
 	needs_lock: boolean;
 
 	constructor(block: Block, node: Binding, parent: ElementWrapper | InlineComponentWrapper) {
@@ -54,8 +53,6 @@ export default class BindingWrapper {
 
 		this.is_readonly = this.node.is_readonly;
 
-		this.has_arg = this.node.has_arg;
-
 		this.needs_lock = this.node.name === 'currentTime';  // TODO others?
 	}
 

src/compiler/compile/render_dom/wrappers/Element/index.ts

@@ -487,7 +487,6 @@ export default class ElementWrapper extends Wrapper {
 			block.add_variable(animation_frame);
 		}
 
-		const has_arg = binding_group.bindings[0].has_arg;
 		const has_local_function = contextual_dependencies.size > 0 || needs_lock || animation_frame;
 
 		let callee = renderer.reference(handler);
@@ -508,13 +507,6 @@ export default class ElementWrapper extends Wrapper {
 						${callee}.call(${this.var}, ${args});
 					}
 				`);
-			} else if (has_arg) {
-				block.chunks.init.push(b`
-					function ${handler}(arg) {
-						${needs_lock && b`${lock} = true;`}
-						${callee}.call(${this.var}, arg, ${args});
-					}
-				`);
 			} else {
 				block.chunks.init.push(b`
 					function ${handler}() {
@@ -532,10 +524,6 @@ export default class ElementWrapper extends Wrapper {
 			name
 		}));
 
-		if (has_arg) {
-			params.unshift({ type: 'Identifier', name: 'arg' });
-		}
-
 		this.renderer.component.partly_hoisted.push(b`
 			function ${handler}(${params}) {
 				${binding_group.bindings.map(b => b.handler.mutation)}