books: remove the limiting note django 1.11.4. 1.11.3 verified to work too
@@ -6,8 +6,6 @@ gone through the tutorial at least.
## Step 0: Let's create a virtual environment and install pyecharts
-**The example code won't work on django version 1.11.3 or lower**.
-
```shell
$ virtualenv --no-site-packages pyecharts-env
$ source pyecharts-env/bin/activate
