[S15] More leftover stuff from the pre-multitype days.

Those functions can handle different NFs now through the magic known as
a "type system", so that bit about special handling is meaningless.

Author: ShimmerFairy

S15-unicode.pod

@@ -261,10 +261,6 @@ transposition of the string without changes in normalization.
 There's plenty of information each Unicode codepoint posesses, and Perl 6
 provides various ways of accessing that information.
 
-Note that all of these functions operate on the codepoint level, which means NFG
-strings are treated as NFC strings within these functions. Strings that are
-already in NFC, NFD, NFKC, or NFKD form are used as-is by these functions.
-
 Unless plural forms of these functions are provided, each function operates only
 on the first codepoint of the string. Various array-based operations would be
 needed to gain information on every character in the string.