Remove "urlParamsToObject"

This change removes the unused and deprecated "urlParamsToObject"
from the code.

app/assets/javascripts/lib/utils/url_utility.js

@@ -417,43 +417,6 @@ export const urlParamsToArray = (path = '') =>
 
 export const getUrlParamsArray = () => urlParamsToArray(window.location.search);
 
-/**
- * Accepts encoding string which includes query params being
- * sent to URL.
- *
- * @param {string} path Query param string
- *
- * @returns {object} Query params object containing key-value pairs
- *                   with both key and values decoded into plain string.
- *
- * @deprecated Please use `queryToObject(query, { gatherArrays: true });` instead. See https://gitlab.com/gitlab-org/gitlab/-/issues/328845
- */
-export const urlParamsToObject = (path = '') =>
-  splitPath(path).reduce((dataParam, filterParam) => {
-    if (filterParam === '') {
-      return dataParam;
-    }
-
-    const data = dataParam;
-    let [key, value] = filterParam.split('=');
-    key = /%\w+/g.test(key) ? decodeURIComponent(key) : key;
-    const isArray = key.includes('[]');
-    key = key.replace('[]', '');
-    value = decodeURIComponent(value.replace(/\+/g, ' '));
-
-    if (isArray) {
-      if (!data[key]) {
-        data[key] = [];
-      }
-
-      data[key].push(value);
-    } else {
-      data[key] = value;
-    }
-
-    return data;
-  }, {});
-
 /**
  * Convert search query into an object
  *

spec/frontend/lib/utils/url_utility_spec.js

@@ -645,29 +645,6 @@ describe('URL utility', () => {
     });
   });
 
-  describe('urlParamsToObject', () => {
-    it('parses path for label with trailing +', () => {
-      // eslint-disable-next-line import/no-deprecated
-      expect(urlUtils.urlParamsToObject('label_name[]=label%2B', {})).toEqual({
-        label_name: ['label+'],
-      });
-    });
-
-    it('parses path for milestone with trailing +', () => {
-      // eslint-disable-next-line import/no-deprecated
-      expect(urlUtils.urlParamsToObject('milestone_title=A%2B', {})).toEqual({
-        milestone_title: 'A+',
-      });
-    });
-
-    it('parses path for search terms with spaces', () => {
-      // eslint-disable-next-line import/no-deprecated
-      expect(urlUtils.urlParamsToObject('search=two+words', {})).toEqual({
-        search: 'two words',
-      });
-    });
-  });
-
   describe('queryToObject', () => {
     it.each`
       case                                                                      | query                               | options                                             | result