chore(*): remove unused code (#6781)

The code removed in the PR was flagged as unused by the JetBrains
inspector.

I did a QA on the dev environment but other checks are highly
recommended.

There is one commit by scope to make the review easier.

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-server/src/modules/calendar/calendar-event-import-manager/utils/get-flattened-values-and-values-string-for-batch-raw-query.util.ts

@@ -26,31 +26,3 @@ export const valuesStringForBatchRawQuery = (
 
   return castedValues.join(', ');
 };
-
-export const getFlattenedValuesAndValuesStringForBatchRawQuery = (
-  values: {
-    [key: string]: any;
-  }[],
-  keyTypeMap: {
-    [key: string]: string;
-  },
-): {
-  flattenedValues: any[];
-  valuesString: string;
-} => {
-  const keysToInsert = Object.keys(keyTypeMap);
-
-  const flattenedValues = values.flatMap((value) =>
-    keysToInsert.map((key) => value[key]),
-  );
-
-  const valuesString = valuesStringForBatchRawQuery(
-    values,
-    Object.values(keyTypeMap),
-  );
-
-  return {
-    flattenedValues,
-    valuesString,
-  };
-};