front: fix clear ci input does not clear ch input in map op search

Signed-off-by: Clara Ni <clara.ni@outlook.fr>

Author: clarani

front/src/common/Map/Search/useSearchOperationalPoint.tsx

@@ -1,6 +1,5 @@
 import { useState, useEffect, useMemo, useCallback } from 'react';
 
-import { isEmpty } from 'lodash';
 import { useSelector } from 'react-redux';
 
 import DPY_TO_MAS_OPERATIONAL_POINTS from 'assets/operationStudies/DPYToMASOperationalPoints';
@@ -175,10 +174,6 @@ export default function useSearchOperationalPoint({
     }
   }, [debouncedSearchTerm]);
 
-  useEffect(() => {
-    if (isEmpty(searchResults)) setChCodeFilter(undefined);
-  }, [searchResults]);
-
   return {
     searchTerm,
     chCodeFilter,