Remove dead code in app and XBRL loader

components/charts/hooks/use-chart-zoom.ts

@@ -1,44 +0,0 @@
-import { useState, useCallback } from 'react';
-import type { ChartZoomState } from '@/lib/types';
-
-export function useChartZoom(dataLength: number) {
-  const [zoomState, setZoomState] = useState<ChartZoomState>({
-    startIndex: 0,
-    endIndex: Math.max(0, dataLength - 1),
-    isZoomed: false
-  });
-
-  const handleZoomChange = useCallback(
-    (brushData: { startIndex?: number; endIndex?: number }) => {
-      if (
-        brushData.startIndex === undefined ||
-        brushData.endIndex === undefined
-      ) {
-        return;
-      }
-
-      setZoomState({
-        startIndex: brushData.startIndex,
-        endIndex: brushData.endIndex,
-        isZoomed:
-          brushData.startIndex !== 0 ||
-          brushData.endIndex !== dataLength - 1
-      });
-    },
-    [dataLength]
-  );
-
-  const resetZoom = useCallback(() => {
-    setZoomState({
-      startIndex: 0,
-      endIndex: Math.max(0, dataLength - 1),
-      isZoomed: false
-    });
-  }, [dataLength]);
-
-  return {
-    zoomState,
-    handleZoomChange,
-    resetZoom
-  };
-}