docs-util: fix links in references to current page (#10703)

www/packages/remark-rehype-plugins/src/utils/expression-is-utils.ts

@@ -1,8 +1,4 @@
-import {
-  ExpressionJsVarItem,
-  ExpressionJsVarLiteral,
-  ExpressionJsVarObj,
-} from "../types/index.js"
+import { ExpressionJsVarLiteral, ExpressionJsVarObj } from "../types/index.js"
 
 export function isExpressionJsVarLiteral(
   expression: unknown
@@ -23,13 +19,3 @@ export function isExpressionJsVarObj(
     !Object.hasOwn(expression, "original")
   )
 }
-
-export function isExpressionJsVarItem(
-  expression: unknown
-): expression is ExpressionJsVarItem {
-  return (
-    typeof expression === "object" &&
-    expression !== null &&
-    Object.hasOwn(expression, "original")
-  )
-}