Control characters are three stroke tokens, \cA, \cB, etc. You cannot put parts of the tokens and put them into a character class. Use: 
  s/[\cA-\cZ]+//g;

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or an equivalent tr construct.

Note also that your use of ^ means you are only going to replace matches at the beginning of the string - at most one character in your example. Which from your description doesn't seem to be want you want.

In reply to Re: Control characters by JavaFan
in thread Control characters by sandy1028

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