Fix up comment now that 'new' is no longer a virt-specifier, from Aaron Ballman

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140389 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseDeclCXX.cpp b/lib/Parse/ParseDeclCXX.cpp
index 2ccbc27..0fcc863 100644
--- a/lib/Parse/ParseDeclCXX.cpp
+++ b/lib/Parse/ParseDeclCXX.cpp
@@ -1572,7 +1572,6 @@
 ///       virt-specifier:
 ///         override
 ///         final
-///         new
 /// 
 ///       pure-specifier:
 ///         '= 0'