Nasc/delete instance code removal (#12307)

* Formatted page

* Removed ResourceHealthPage from the dashboard

* Deleted files that no longer applies to the public preview backend

* shouldn't be able to open the postgres dashboard

extensions/azdata/src/azdata.ts

@@ -78,6 +78,9 @@ export class AzdataTool implements IAzdataTool {
 		},
 		postgres: {
 			server: {
+				delete: async (name: string) => {
+					return this.executeCommand<void>(['arc', 'postgres', 'server', 'delete', '-n', name]);
+				},
 				list: async () => {
 					return this.executeCommand<azdataExt.PostgresServerListResult[]>(['arc', 'postgres', 'server', 'list']);
 				},

extensions/azdata/src/extension.ts

@@ -85,6 +85,10 @@ export async function activate(context: vscode.ExtensionContext): Promise<azdata
 				},
 				postgres: {
 					server: {
+						delete: async (name: string) => {
+							await throwIfNoAzdataOrEulaNotAccepted();
+							return localAzdata!.arc.postgres.server.delete(name);
+						},
 						list: async () => {
 							await throwIfNoAzdataOrEulaNotAccepted();
 							return localAzdata!.arc.postgres.server.list();

extensions/azdata/src/typings/azdata-ext.d.ts

@@ -228,6 +228,7 @@ declare module 'azdata-ext' {
 			},
 			postgres: {
 				server: {
+					delete(name: string): Promise<AzdataOutput<void>>,
 					list(): Promise<AzdataOutput<PostgresServerListResult[]>>,
 					show(name: string): Promise<AzdataOutput<PostgresServerShowResult>>,
 					edit(args: {