Remove dead method

src/lib/output/renderer.ts

@@ -113,10 +113,6 @@ export class Renderer extends ChildableComponent<
         ["default", DefaultTheme],
     ]);
 
-    private unknownSymbolResolvers: Array<
-        (ref: DeclarationReference) => string | undefined
-    > = [];
-
     /** @event */
     static readonly EVENT_BEGIN_PAGE = PageEvent.BEGIN;
     /** @event */
@@ -209,21 +205,6 @@ export class Renderer extends ChildableComponent<
         });
     }
 
-    /**
-     * Marked as internal for now. Using this requires the internal `getSymbol()` method on ReferenceType.
-     * Someday that needs to be fixed so that this can be made public. ReferenceTypes really shouldn't store
-     * symbols so that we don't need to keep the program around forever.
-     *
-     * Remove in 0.24.
-     * @internal
-     */
-    attemptExternalResolution(ref: DeclarationReference): string | undefined {
-        for (const resolver of this.unknownSymbolResolvers) {
-            const resolved = resolver(ref);
-            if (resolved) return resolved;
-        }
-    }
-
     /**
      * Render the given project reflection to the specified output directory.
      *
@@ -392,4 +373,3 @@ export class Renderer extends ChildableComponent<
 // HACK: THIS HAS TO STAY DOWN HERE
 // if you try to move it up to the top of the file, then you'll run into stuff being used before it has been defined.
 import "./plugins";
-import type { DeclarationReference } from "../converter/comments/declarationReference";

src/lib/output/themes/default/DefaultThemeRenderContext.ts

@@ -80,9 +80,7 @@ export class DefaultThemeRenderContext {
      * Will be removed in 0.24.
      */
     attemptExternalResolution = (type: NeverIfInternal<ReferenceType>) => {
-        return this.theme.owner.attemptExternalResolution(
-            (type as ReferenceType).toDeclarationReference()
-        );
+        return (type as ReferenceType).externalUrl;
     };
 
     reflectionTemplate = bind(reflectionTemplate, this);