renovatebot: Remove label assignments

Let triagebot handle all labeling instead of duplicating the logic.

Author: Turbo87

.github/renovate.json5

@@ -13,14 +13,6 @@
         "github>Turbo87/renovate-config//rust/updateToolchain",
     ],
     packageRules: [
-        {
-            matchCategories: ["rust"],
-            labels: ["A-backend ⚙️"],
-        },
-        {
-            matchCategories: ["js"],
-            labels: ["A-frontend 🐹"],
-        },
         {
             matchDepNames: ["ember-cli", "ember-data", "ember-source"],
             separateMinorPatch: true,
@@ -55,7 +47,6 @@
             matchManagers: ["custom.regex"],
             matchDepNames: ["rust"],
             commitMessageTopic: "Rust",
-            labels: ["A-backend ⚙️"],
         },
         {
             matchDepNames: ["/^diesel$/", "/^diesel_/"],