DEV: Remove package.json and yarn.lock symlinks

These were part of the Ember 3/5 feature-flagging system, which is no longer required.

app/assets/javascripts/package-ember5.json

@@ -1,33 +0,0 @@
-{
-  "private": true,
-  "scripts": {
-    "postinstall": "./run-patch-package"
-  },
-  "workspaces": [
-    "admin",
-    "bootstrap-json",
-    "deprecation-silencer",
-    "dialog-holder",
-    "discourse",
-    "discourse-common",
-    "discourse-hbr",
-    "discourse-i18n",
-    "discourse-markdown-it",
-    "discourse-plugins",
-    "discourse-widget-hbs",
-    "ember-cli-progress-ci",
-    "ember-production-deprecations",
-    "float-kit",
-    "pretty-text",
-    "select-kit",
-    "theme-transpiler",
-    "truth-helpers"
-  ],
-  "resolutions": {
-    "**/unset-value": "2.0.1"
-  },
-  "devDependencies": {
-    "patch-package": "^8.0.0",
-    "postinstall-postinstall": "^2.1.0"
-  }
-}

app/assets/javascripts/package.json

@@ -1 +1,33 @@
-package-ember5.json
+{
+  "private": true,
+  "scripts": {
+    "postinstall": "./run-patch-package"
+  },
+  "workspaces": [
+    "admin",
+    "bootstrap-json",
+    "deprecation-silencer",
+    "dialog-holder",
+    "discourse",
+    "discourse-common",
+    "discourse-hbr",
+    "discourse-i18n",
+    "discourse-markdown-it",
+    "discourse-plugins",
+    "discourse-widget-hbs",
+    "ember-cli-progress-ci",
+    "ember-production-deprecations",
+    "float-kit",
+    "pretty-text",
+    "select-kit",
+    "theme-transpiler",
+    "truth-helpers"
+  ],
+  "resolutions": {
+    "**/unset-value": "2.0.1"
+  },
+  "devDependencies": {
+    "patch-package": "^8.0.0",
+    "postinstall-postinstall": "^2.1.0"
+  }
+}