build: Remove unused build time constant

Author: rkunev

vite.config.js

@@ -4,9 +4,6 @@ import vue from '@vitejs/plugin-vue';
 
 export default {
     plugins: [vue()],
-    define: {
-        __DEV__: true,
-    },
     test: {
         environment: 'jsdom',
         coverage: {