docs: remove setup for local dev and anatomy of setup docs from nav (#26380)

PR Close #26380

aio/content/navigation.json

@@ -473,7 +473,7 @@
           "url": "guide/universal",
           "title": "Server-side Rendering",
           "tooltip": "Render HTML server-side with Angular Universal."
-        },  
+        },
         {
           "title": "Upgrading from AngularJS",
           "tooltip": "Incrementally upgrade an AngularJS application to Angular.",
@@ -509,7 +509,7 @@
           "tooltip": "Install the Angular QuickStart seed for faster, more efficient development on your machine.",
           "hidden": true
         },
-        
+
         {
           "url": "guide/file-structure",
           "title": "Project File Structure",
@@ -524,7 +524,7 @@
           "url": "guide/typescript-configuration",
           "title": "TypeScript Configuration",
           "tooltip": "TypeScript configuration for Angular developers."
-        }, 
+        },
         {
           "url": "guide/aot-compiler",
           "title": "Ahead-of-Time Compilation",
@@ -544,14 +544,14 @@
           "url": "guide/deployment",
           "title": "Deployment",
           "tooltip": "Learn how to deploy your Angular app."
-        }, 
+        },
         {
           "url": "guide/browser-support",
           "title": "Browser Support",
           "tooltip": "Browser support and polyfills guide."
         },
 
-        { 
+        {
           "title": "Dev Tool Integration",
           "tooltip": "Integrate with your development environment and tools.",
           "children": [
@@ -567,13 +567,6 @@
              "hidden": true
            }
           ]
-        },
-
-        {
-          "url": "guide/setup-systemjs-anatomy",
-          "title": "Anatomy of the Setup",
-          "tooltip": "Inside the local development environment for SystemJS.",
-          "hidden": true
         }
      ]
     },
@@ -592,6 +585,22 @@
            "url": "guide/updating",
             "title": "Keeping Up-to-Date",
             "tooltip": "Information about updating Angular applications and libraries to the latest version."
+        },
+        {
+          "title": "Upgrading from AngularJS",
+          "tooltip": "Incrementally upgrade an AngularJS application to Angular.",
+          "children": [
+            {
+              "url": "guide/upgrade",
+              "title": "Upgrading Instructions",
+              "tooltip": "Incrementally upgrade an AngularJS application to Angular."
+            },
+            {
+              "url": "guide/ajs-quick-reference",
+              "title": "AngularJS-Angular Concepts",
+              "tooltip": "Learn how AngularJS concepts and techniques map to Angular."
+            }
+          ]
         }
       ]
     },