fix: remove misleading description (#3778)

Signed-off-by: Norwin Schnyder <[email protected]>

Author: snorwin

apis/v1/httproute_types.go

@@ -988,11 +988,11 @@ type HTTPHeader struct {
 }
 
 // HTTPHeaderFilter defines a filter that modifies the headers of an HTTP
-// request or response. Only one action for a given header name is permitted.
-// Filters specifying multiple actions of the same or different type for any one
-// header name are invalid and will be rejected by CRD validation.
-// Configuration to set or add multiple values for a header must use RFC 7230
-// header value formatting, separating each value with a comma.
+// request or response. Only one action for a given header name is
+// permitted. Filters specifying multiple actions of the same or different
+// type for any one header name are invalid. Configuration to set or add
+// multiple values for a header must use RFC 7230 header value formatting,
+// separating each value with a comma.
 type HTTPHeaderFilter struct {
 	// Set overwrites the request with the given header (name, value)
 	// before the action.