[rush-lib] remove useless field "rushAlertsStateFilename" (#5111)

* chore: remove useless field

* rush change

Author: L-Qun

common/changes/@microsoft/rush/chore-remove-useless-field_2025-02-16-09-52.json

@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@microsoft/rush",
+      "comment": "Remove the unused `RushConstants.rushAlertsStateFilename` property.",
+      "type": "none"
+    }
+  ],
+  "packageName": "@microsoft/rush"
+}

common/reviews/api/rush-lib.api.md

@@ -1386,7 +1386,6 @@ export class RushConstants {
     static readonly rebuildCommandName: 'rebuild';
     static readonly repoStateFilename: 'repo-state.json';
     static readonly rushAlertsConfigFilename: 'rush-alerts.json';
-    static readonly rushAlertsStateFilename: 'rush-alerts-state.json';
     static readonly rushJsonFilename: 'rush.json';
     static readonly rushLogsFolderName: 'rush-logs';
     static readonly rushPackageName: '@microsoft/rush';

libraries/rush-lib/src/logic/RushConstants.ts

@@ -338,11 +338,6 @@ export class RushConstants {
    */
   public static readonly rushAlertsConfigFilename: 'rush-alerts.json' = 'rush-alerts.json';
 
-  /**
-   * The filename for the machine-generated file that tracks state for Rush alerts.
-   */
-  public static readonly rushAlertsStateFilename: 'rush-alerts-state.json' = 'rush-alerts-state.json';
-
   /**
    * The filename for the file that tracks which variant is currently installed.
    */