chore(frontend): remove unused debug data

frontend/src/constants/constants.ts

-import { ImportProcess } from "@/components/ImportProcessTable";
-import { DataService, Project, Recipe } from "@/types";
-
-// TODO placeholder data, remove when we connect to backend.
-
-export const PROJECTS: Array<Project> = [
-  {
-    eid: 1,
-    name: "Prod",
-    activated: true,
-    sparql_endpoint: "https://virtuoso.fr",
-  },
-  {
-    eid: 2,
-    name: "Pre Prod",
-    activated: false,
-    sparql_endpoint: "https://virtuoso.fr",
-  },
-  {
-    eid: 3,
-    name: "test (dryrun)",
-    activated: true,
-    sparql_endpoint: "https://virtuoso.fr",
-  },
-];
-
-export const DATA_SERVICES: Array<DataService> = [
-  {
-    eid: 1,
-    name: "Syracuse",
-    data_url: "https://syracuse.fr",
-    refresh_period: "weekly",
-  },
-  {
-    eid: 2,
-    name: "Syracuse Preprod",
-    data_url: "https://preprod.syracuse.fr",
-    refresh_period: "weekly",
-  },
-  {
-    eid: 3,
-    name: "ONB",
-    data_url: "https://onb.opera.fr",
-    refresh_period: "weekly",
-  },
-];
-
-export const RECIPES: Array<Recipe> = [
-  {
-    eid: 1,
-    name: "Syracuse",
-    process_type: "default",
-  },
-  {
-    eid: 2,
-    name: "Syracuse Preprod",
-    process_type: "default-dryrun",
-  },
-  {
-    eid: 3,
-    name: "ONB",
-    process_type: "default",
-  },
-];
-
-export const DATA_SERVICE: DataService = {
-  eid: 1,
-  name: "Syracuse",
-  data_url: "https://syracuse.fr",
-  refresh_period: "weekly",
-};
-
-export const PROJECT: Project = {
-  eid: 1,
-  name: "Prod",
-  activated: true,
-  sparql_endpoint: "https://virtuoso.fr",
-};
-
-export const IMPORT_PROCESSES: Array<ImportProcess> = [
-  {
-    eid: 5,
-    date: "09/01/2024 12:14",
-    recette: "IR1 (Syracuse)",
-    state: true,
-    project: "Prod",
-  },
-  {
-    eid: 6,
-    date: "09/01/2024 12:14",
-    recette: "IR2 (Syracuse)",
-    state: false,
-    project: "Prod",
-  },
-];

frontend/src/hooks/useLoad.tsx

-import { useEffect, useState } from "react";
-
-export function useLoad<T>(resolveData: T, showError?: boolean) {
-  const [data, setData] = useState<T | undefined>();
-  const [loading, setLoading] = useState<boolean>(true);
-  const [errors, setErrors] = useState<Record<string, string> | undefined>();
-
-  useEffect(() => {
-    setLoading(true);
-    setTimeout(() => {
-      setLoading(false);
-      if (showError) {
-        setErrors(undefined);
-        setData(undefined);
-      } else {
-        setData(resolveData);
-        setErrors(undefined);
-      }
-    }, 200);
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, []);
-
-  return { data, loading, errors };
-}