Remove deprecated "Asynchronous Processing" connection property (#20830)

extensions/mssql/package.json

@@ -946,20 +946,6 @@
           "isRequired": false,
           "isArray": false
         },
-        {
-          "specialValueType": null,
-          "isIdentity": false,
-          "name": "asynchronousProcessing",
-          "displayName": "%mssql.connectionOptions.asynchronousProcessing.displayName%",
-          "description": "%mssql.connectionOptions.asynchronousProcessing.description%",
-          "groupName": "%mssql.connectionOptions.groupName.initialization%",
-          "valueType": "boolean",
-          "defaultValue": null,
-          "objectType": null,
-          "categoryValues": null,
-          "isRequired": false,
-          "isArray": false
-        },
         {
           "specialValueType": null,
           "isIdentity": false,

extensions/mssql/package.nls.json

@@ -127,8 +127,6 @@
 	"mssql.connectionOptions.password.description": "Indicates the password to be used when connecting to the data source",
 	"mssql.connectionOptions.applicationIntent.displayName": "Application intent",
 	"mssql.connectionOptions.applicationIntent.description": "Declares the application workload type when connecting to a server",
-	"mssql.connectionOptions.asynchronousProcessing.displayName": "Asynchronous processing",
-	"mssql.connectionOptions.asynchronousProcessing.description": "When true, enables usage of the Asynchronous functionality in the .Net Framework Data Provider",
 	"mssql.connectionOptions.connectTimeout.displayName": "Connect timeout",
 	"mssql.connectionOptions.connectTimeout.description": "The length of time (in seconds) to wait for a connection to the server before terminating the attempt and generating an error",
 	"mssql.connectionOptions.currentLanguage.displayName": "Current language",