docs(vue): remove the coming soon page (#3663)

Author: thetaPC

docs/vue/testing.md

@@ -173,7 +173,6 @@ module.exports = {
         'vue/platform',
         'vue/pwa',
         'vue/storage',
-        'vue/testing',
         'vue/troubleshooting',
         'vue/performance',
       ],

sidebars.js

@@ -184,7 +184,6 @@
         "vue/platform",
         "vue/pwa",
         "vue/storage",
-        "vue/testing",
         "vue/troubleshooting",
         "vue/performance"
       ]