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

After

editor:
    config:
        removePlugins:
            - image