c++: tweak comment

The comment documented a parameter that no longer exists.

gcc/cp/ChangeLog:

	* constraint.cc (deduce_concept_introduction): Adjust comment.

diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc
index 8e25ae2367028b95c05c8ea6857aef0cb6cca0e6..8386a7dd411ce1498c5ad24ecb0060b035864b61 100644 (file)
--- a/gcc/cp/constraint.cc
+++ b/gcc/cp/constraint.cc
@@ -450,8 +450,6 @@ deduce_concept_introduction (tree check)
 /* Build a constrained placeholder type where SPEC is a type-constraint.
    SPEC can be anything were concept_definition_p is true.
 
-   If DECLTYPE_P is true, then the placeholder is decltype(auto).
-
    Returns a pair whose FIRST is the concept being checked and whose
    SECOND is the prototype parameter.  */