diff --git a/src/ast/nodes/Identifier.ts b/src/ast/nodes/Identifier.ts
index b488f8448ab..69fb68cfd5d 100644
--- a/src/ast/nodes/Identifier.ts
+++ b/src/ast/nodes/Identifier.ts
@@ -45,7 +45,7 @@ export default class Identifier extends NodeBase implements PatternNode {
 	}
 
 	bind(): void {
-		if (this.variable === null && isReference(this, this.parent as any)) {
+		if (this.variable === null && isReference(this, this.parent)) {
 			this.variable = this.scope.findVariable(this.name);
 			this.variable.addReference(this);
 		}
diff --git a/typings/declarations.d.ts b/typings/declarations.d.ts
index 52eb1bbc86c..d4b36e82f62 100644
--- a/typings/declarations.d.ts
+++ b/typings/declarations.d.ts
@@ -9,11 +9,6 @@ declare module 'rollup-plugin-string' {
 	export const string: import('rollup').PluginImpl;
 }
 
-declare module 'rollup-plugin-typescript' {
-	const typescript: import('rollup').PluginImpl;
-	export default typescript;
-}
-
 declare module 'acorn-walk' {
 	type WalkerCallback<TState> = (node: acorn.Node, state: TState) => void;
 	type RecursiveWalkerFn<TState> = (
@@ -29,7 +24,7 @@ declare module 'is-reference' {
 	export default function is_reference(
 		node: NodeWithFieldDefinition,
 		parent: NodeWithFieldDefinition
-	): unknown;
+	): boolean;
 	export type Node =
 		| import('estree').Identifier
 		| import('estree').SimpleLiteral