Remove value from formData when property is removed (not required)

[zrzka]

Description

I'm trying to achieve something like this:

• if enable property is true, it MUST contain ssid property
• if enable property is false, it MUST NOT contain ssid property

Steps to Reproduce

1. Open this example
2. Enable WiFi
3. Fill in SSID
4. Disable WiFi
5. Error ['ssid'] should NOT have additional properties appears

If the link in 1. wont work, here's the schema.

Expected behavior

No ['ssid'] should NOT have additional properties error. I expect that there will be no ssid value in formData when I disable WiFi.

Actual behavior

Keeps ssid in formData and raising ['ssid'] should NOT have additional properties error.

[loganvolkers]

I believe this is related to #902 and #848.

I believe there is a longstanding issue when using "additionalProperties": false