Breaking: #101192 - Remove fallback for CKEditor removePlugins 

See forge#101192

Description 

Remove fallback for CKEditor configuration removePlugins as a string.

Impact 

Runtime Javascript errors can occur if the CKEditor configuration removePlugins isn't an array.

Affected installations 

TYPO3 installation which have CKEditor configuration removePlugins configured as a string.

Migration 

Adjust your CKEditor configuration and pass removePlugins as array.

Before 

editor:
    config:
        removePlugins: image
Copied!

After 

editor:
    config:
        removePlugins:
            - image
Copied!