chore: Remove obsolete Druid NoSQL REGEX operator (#24415)

UPDATING.md

@@ -34,6 +34,7 @@ assists people when migrating to a new version.
 
 ### Breaking Changes
 
+- [24415](https://github.com/apache/superset/pull/24415): Removed the obsolete Druid NoSQL REGEX operator.
 - [24423](https://github.com/apache/superset/pull/24423): Removed deprecated APIs `/superset/slice_json/...`, `/superset/annotation_json/...`
 - [24400](https://github.com/apache/superset/pull/24400): Removed deprecated APIs `/superset/recent_activity/...`, `/superset/fave_dashboards_by_username/...`, `/superset/fave_dashboards/...`, `/superset/created_dashboards/...`, `/superset/user_slices/`, `/superset/created_slices/...`, `/superset/fave_slices/...`, `/superset/favstar/...`,
 - [24401](https://github.com/apache/superset/pull/24401): Removes the deprecated `metrics` column (which was blossomed in [20732](https://github.com/apache/superset/pull/20732)) from the `/api/v1/dataset/` API.

superset-frontend/src/explore/constants.ts

@@ -39,7 +39,6 @@ export enum Operators {
   NOT_IN = 'NOT_IN',
   LIKE = 'LIKE',
   ILIKE = 'ILIKE',
-  REGEX = 'REGEX',
   IS_NOT_NULL = 'IS_NOT_NULL',
   IS_NULL = 'IS_NULL',
   LATEST_PARTITION = 'LATEST_PARTITION',
@@ -75,7 +74,6 @@ export const OPERATOR_ENUM_TO_OPERATOR_TYPE: {
     display: t('Like (case insensitive)'),
     operation: 'ILIKE',
   },
-  [Operators.REGEX]: { display: t('Regex'), operation: 'REGEX' },
   [Operators.IS_NOT_NULL]: {
     display: t('Is not null'),
     operation: 'IS NOT NULL',

superset/utils/core.py

@@ -236,7 +236,6 @@ class FilterOperator(str, Enum):
     IS_NOT_NULL = "IS NOT NULL"
     IN = "IN"
     NOT_IN = "NOT IN"
-    REGEX = "REGEX"
     IS_TRUE = "IS TRUE"
     IS_FALSE = "IS FALSE"
     TEMPORAL_RANGE = "TEMPORAL_RANGE"
@@ -253,7 +252,6 @@ class FilterStringOperators(str, Enum):
     NOT_IN = ("NOT_IN",)
     ILIKE = ("ILIKE",)
     LIKE = ("LIKE",)
-    REGEX = ("REGEX",)
     IS_NOT_NULL = ("IS_NOT_NULL",)
     IS_NULL = ("IS_NULL",)
     LATEST_PARTITION = ("LATEST_PARTITION",)