**Describe the bug**
Websocket will listen when nanomq is started by default.
But no configuration for WebSocket in nanomq.conf.

**Expected behavior**
No WebSocket start.

**Actual Behavior**
The web socket starts.

Websocket will listen by default.
This is a GitHub Issue
repo:nanomq
owner:emqx
Title : Websocket will listen by default.
Issue date:

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**Describe the bug**
Websocket will listen when nanomq is started by default.
But no configuration for WebSocket in nanomq.conf.

**Expected behavior**
No WebSocket start.

**Actual Behavior**
The web socket starts.

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