Revert "Revert "Add Deprecated to MarkerTag""

This reverts commit 64982b60.

src/vs/editor/common/standalone/standaloneEnums.ts

@@ -7,7 +7,8 @@
 
 
 export enum MarkerTag {
-	Unnecessary = 1
+	Unnecessary = 1,
+	Deprecated = 2
 }
 
 export enum MarkerSeverity {

src/vs/monaco.d.ts

@@ -27,7 +27,8 @@ declare namespace monaco {
 
 
 	export enum MarkerTag {
-		Unnecessary = 1
+		Unnecessary = 1,
+		Deprecated = 2
 	}
 
 	export enum MarkerSeverity {

src/vs/platform/markers/common/markers.ts

@@ -39,6 +39,7 @@ export interface IRelatedInformation {
 
 export const enum MarkerTag {
 	Unnecessary = 1,
+	Deprecated = 2
 }
 
 export enum MarkerSeverity {