Remove zlib error invalid_code_lenths(sic) (API Change):

API Changes:

The error code enum `invalid_code_lenths` was a synonym of `invalid_code_lengths`.
Affected programs should be modified to use `invalid_code_lengths`.

refs #1934

include/boost/beast/zlib/error.hpp

@@ -107,9 +107,6 @@ enum class error
 
     /// Invalid code lengths
     invalid_code_lengths,
-#ifdef BOOST_BEAST_ALLOW_DEPRECATED
-    invalid_code_lenths = invalid_code_lengths,
-#endif
 
     /// Invalid bit length repeat
     invalid_bit_length_repeat,