[func.def] Simplify "references to functions and references to objects"

to simply "references".

Author: zygoloid

source/utilities.tex

@@ -13873,7 +13873,7 @@
 
 \pnum
 A call wrapper type may additionally hold
-a sequence of objects, references to functions, and references to objects,
+a sequence of objects and references
 that may be passed as arguments to the target object.
 These entities are collectively referred to
 as \defnx{bound argument entities}{bound argument entity}.