[REM] web: remove useless and buggy test.

Removing the test "field changes are correctly debounced in text fields"
because it doesn't represent the reality that fields are not debounced
anymore in production code.

This test was nondeterministic.

addons/web/static/tests/fields/basic_fields_tests.js

@@ -2379,67 +2379,6 @@ QUnit.module('basic_fields', {
         list.destroy();
     });
 
-    QUnit.test('field changes are correctly debounced in text fields', async function (assert) {
-        var done = assert.async();
-        assert.expect(5);
-
-        this.data.partner.fields.foo.type = 'text';
-
-        var def = testUtils.makeTestPromise();
-        var nbNotifyChanges = 0;
-        var form = await createView({
-            View: FormView,
-            model: 'partner',
-            data: this.data,
-            arch: '<form string="Partners">' +
-                    '<field name="foo"/>' +
-                '</form>',
-            res_id: 2,
-            fieldDebounce: 3,
-        });
-
-        var _onFieldChanged = form._onFieldChanged;
-        form._onFieldChanged = function () {
-            _onFieldChanged.apply(form, arguments);
-            nbNotifyChanges++;
-            def.resolve();
-        };
-
-        await testUtils.form.clickEdit(form);
-
-        testUtils.fields.editInput(form.$('textarea').first(), "1");
-        assert.strictEqual(nbNotifyChanges, 0,
-            "no event should have been triggered");
-        testUtils.fields.editInput(form.$('textarea').first(), "12");
-        assert.strictEqual(nbNotifyChanges, 0,
-            "no event should have been triggered");
-
-        return waitForChangeTriggered().then(async function () {
-            assert.strictEqual(nbNotifyChanges, 1,
-                "one event should have been triggered");
-
-            // add something in the textarea, then focus another input
-            await testUtils.fields.editInput(form.$('textarea').first(), "123");
-            assert.strictEqual(nbNotifyChanges, 2,
-                "one event should have been triggered immediately");
-
-            return waitForChangeTriggered();
-        }).then(function () {
-            assert.strictEqual(nbNotifyChanges, 2,
-                "no extra event should have been triggered");
-
-            form.destroy();
-            done();
-        });
-
-        function waitForChangeTriggered() {
-            return def.then(function () {
-                def = testUtils.makeTestPromise();
-                return testUtils.nextTick();
-            });
-        }
-    });
-
     QUnit.module('FieldImage');
 
     QUnit.test('image fields are correctly rendered', async function (assert) {