Update programming_interface.adoc

adoc/chapters/programming_interface.adoc

@@ -16936,9 +16936,6 @@ This type allows sharing of vectors between the host and its SYCL devices.
 The vector supports member functions that allow construction of a new vector
 from a swizzled set of component elements.
 
-[code]#vec<typename _DataT_, int _NumElements_># is a vector type that compiles
-down to a <<backend>> built-in vector type on SYCL devices, where possible, and
-provides compatible support on the host when not possible.
 The [code]#vec# class is templated on its number of elements and its element
 type.
 The number of elements parameter, _NumElements_, can be one of: 1, 2, 3, 4, 8 or 16.