Strike extraneous requirement from Note D

Author: CaseyCarter

source/utilities.tex

@@ -17208,9 +17208,7 @@
 Moreover, \tcode{basic_common_reference<T, U, TQual, UQual>::type} shall denote
 the same type, if any, as does
 \tcode{basic_common_reference<U, T, UQual, TQual>::type}.
-A program shall not specialize \tcode{basic_common_reference} on the third or
-fourth parameters, \tcode{TQual} or \tcode{UQual}. No diagnostic is required for
-a violation of these rules.
+No diagnostic is required for a violation of these rules.
 
 \pnum
 \begin{example}