Remove unused handleXhrError and handleFetchError functions

packages/common/error.js

 import {send as notify} from './notification';
 import {i18n} from "./i18n";
 
-/**
- * Error handling for XHR errors
- *
- * @param jqXHR
- * @param textStatus
- * @param errorThrown
- * @param icon
- */
-export const handleXhrError = (jqXHR, textStatus, errorThrown, icon = "sad") => {
-    // return if user aborted the request
-    if (textStatus === "abort") {
-        return;
-    }
-
-    let body;
-
-    if (jqXHR.responseJSON !== undefined && jqXHR.responseJSON["hydra:description"] !== undefined) {
-        // response is a JSON-LD
-        body = jqXHR.responseJSON["hydra:description"];
-    } else if (jqXHR.responseJSON !== undefined && jqXHR.responseJSON['detail'] !== undefined) {
-        // response is a plain JSON
-        body = jqXHR.responseJSON['detail'];
-    } else {
-        // no description available
-        body = textStatus;
-    }
-
-    // if the server is not reachable at all
-    if (jqXHR.status === 0) {
-        body = i18n.t('error.connection-to-server-refused');
-    }
-
-    notify({
-        "summary": i18n.t('error.summary'),
-        "body": escapeHTML(stripHTML(body)),
-        "icon": icon,
-        "type": "danger",
-    });
-};
-
-/**
- * Error handling for fetch errors
- *
- * @param error
- * @param summary
- * @param icon
- */
-export const handleFetchError = async (error, summary = "", icon = "sad") => {
-    // return if user aborted the request
-    if (error.name === "AbortError") {
-        return;
-    }
-
-    let body;
-
-    try {
-        await error.json().then((json) => {
-            if (json["hydra:description"] !== undefined) {
-                // response is a JSON-LD and possibly also contains HTML!
-                body = json["hydra:description"];
-            } else if (json['detail'] !== undefined) {
-                // response is a plain JSON
-                body = json['detail'];
-            } else {
-                // no description available
-                body = error.statusText;
-            }
-        }).catch(() => {
-            body = error.statusText !== undefined ? error.statusText : error;
-        });
-    } catch (e) {
-        // a TypeError means the connection to the server was refused most of the times
-        if (error.name === "TypeError") {
-            body = error.message !== "" ? error.message : i18n.t('error.connection-to-server-refused');
-        }
-    }
-
-    notify({
-        "summary": summary === "" ? i18n.t('error.summary') : summary,
-        "body": escapeHTML(stripHTML(body)),
-        "icon": icon,
-        "type": "danger",
-    });
-};
-
 /**
  * Escapes html
  *