webdav/internal/xml: use the built-in min function

Starting from Go 1.21, the min functions are built-in.

Therefore, we can remove the custom functions with the same name.

Change-Id: Ia13e609358e19cf3863edc0f5a34e737cdcc291f
Reviewed-on: https://go-review.googlesource.com/c/net/+/707555
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Carlos Amedee <[email protected]>
Reviewed-by: Junyang Shao <[email protected]>
Reviewed-by: Sean Liao <[email protected]>
Auto-Submit: Sean Liao <[email protected]>

Author: cuishuang

webdav/internal/xml/typeinfo.go

@@ -258,13 +258,6 @@ func lookupXMLName(typ reflect.Type) (xmlname *fieldInfo) {
 	return nil
 }
 
-func min(a, b int) int {
-	if a <= b {
-		return a
-	}
-	return b
-}
-
 // addFieldInfo adds finfo to tinfo.fields if there are no
 // conflicts, or if conflicts arise from previous fields that were
 // obtained from deeper embedded structures than finfo. In the latter