minor #1644 [Doc] Fix a minor issue in Vue docs (javiereguiluz)

This PR was squashed before being merged into the 2.x branch.

Discussion
----------

[Doc] Fix a minor issue in Vue docs

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Issues        | -
| License       | MIT

Fixes this error shown when building docs:

```
Errors for ux-vue / 2.x

Error while processing "code-block" directive: "Unsupported code block language ""
in file "index" at line 157
```

Commits
-------

f1451a3 [Doc] Fix a minor issue in Vue docs

Author: kbond

src/Vue/doc/index.rst

@@ -143,9 +143,7 @@ Web History mode with Vue Router
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 To use "web" history mode with Vue Router, a catch-all route will be needed
-which should render the same template and Vue component:
-
-.. code-block::
+which should render the same template and Vue component::
 
     #Route('/survey/{path<.+>}')
     public function survey($path = ''): Response