[TYPO3-english] got error while removing tinymce_rte

[tom]

 Hi,

I was tring tring to remove tinymce_rte from typo3->extension management,
but got bellow error, any idea about this?*

Fatal error*: Uncaught exception 'BadFunctionCallException' with message
'TYPO3 Fatal Error: Extension key "tinymce_rte" was NOT loaded!'

Tom