feat: centralize frontend branding

frontend/tailwind.config.js

@@ -8,8 +8,6 @@ export default {
     theme: {
         extend: {
             colors: {
-                hutopyPrimary: "var(--hutopy-primary)",
-                hutopySecondary: "var(--hutopy-secondary)",
                 hBackground: "var(--h-background)",
                 hOnBackground: "var(--h-on-background)",
                 hSurface: "var(--h-surface)",
@@ -27,4 +25,3 @@ export default {
     },
     plugins: []
 }
-