remove getSessionRequest

ts/session/protocols/SessionProtocol.ts

@@ -270,34 +270,20 @@ export class SessionProtocol {
     }
   }
 
-  /**
-   * This is a utility function to avoid duplicate code between `getProcessedSessionRequest()` and `getSentSessionRequest()`
-   */
-  private static async getSessionRequest(
-    device: string,
-    map: StringToNumberMap
-  ): Promise<number | undefined> {
-    await SessionProtocol.fetchFromDBIfNeeded();
-
-    return map[device];
-  }
-
   private static async getSentSessionRequest(
     device: string
   ): Promise<number | undefined> {
-    return SessionProtocol.getSessionRequest(
-      device,
-      SessionProtocol.sentSessionsTimestamp
-    );
+    await SessionProtocol.fetchFromDBIfNeeded();
+
+    return SessionProtocol.sentSessionsTimestamp[device];
   }
 
   private static async getProcessedSessionRequest(
     device: string
   ): Promise<number | undefined> {
-    return SessionProtocol.getSessionRequest(
-      device,
-      SessionProtocol.processedSessionsTimestamp
-    );
+    await SessionProtocol.fetchFromDBIfNeeded();
+
+    return SessionProtocol.processedSessionsTimestamp[device];
   }
 
   private static async hasAlreadySentSessionRequest(