refactor: remove experimentalAngularNext (#12897)

Closes #12769

Author: alan-agius4

packages/schematics/angular/workspace/files/package.json

@@ -11,23 +11,23 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
-    "@angular/common": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
-    "@angular/compiler": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
-    "@angular/core": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
-    "@angular/forms": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
-    "@angular/http": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
-    "@angular/platform-browser": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
-    "@angular/platform-browser-dynamic": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
-    "@angular/router": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
+    "@angular/animations": "<%= latestVersions.Angular %>",
+    "@angular/common": "<%= latestVersions.Angular %>",
+    "@angular/compiler": "<%= latestVersions.Angular %>",
+    "@angular/core": "<%= latestVersions.Angular %>",
+    "@angular/forms": "<%= latestVersions.Angular %>",
+    "@angular/http": "<%= latestVersions.Angular %>",
+    "@angular/platform-browser": "<%= latestVersions.Angular %>",
+    "@angular/platform-browser-dynamic": "<%= latestVersions.Angular %>",
+    "@angular/router": "<%= latestVersions.Angular %>",
     "core-js": "^2.5.4",
     "rxjs": "<%= latestVersions.RxJs %>",
     "zone.js": "<%= latestVersions.ZoneJs %>"
   },
   "devDependencies": {
-    "@angular/cli": "<%= experimentalAngularNext ? 'next' : '~' + version %>",
-    "@angular/compiler-cli": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
-    "@angular/language-service": "<%= experimentalAngularNext ? 'next' : latestVersions.Angular %>",
+    "@angular/cli": "<%= '~' + version %>",
+    "@angular/compiler-cli": "<%= latestVersions.Angular %>",
+    "@angular/language-service": "<%= latestVersions.Angular %>",
     "@types/node": "~8.9.4",<% if (!minimal) { %>
     "@types/jasmine": "~2.8.8",
     "@types/jasminewd2": "~2.0.3",

packages/schematics/angular/workspace/schema.json

@@ -13,11 +13,6 @@
         "index": 0
       }
     },
-    "experimentalAngularNext": {
-      "description": "Use the next version of Angular (@next dist-tag).",
-      "type": "boolean",
-      "visible": "false"
-    },
     "newProjectRoot": {
       "description": "The path where new projects will be created.",
       "type": "string",