config/v1/types_cluster_version: Drop never-implemented 'Evaluating' …

…conditionalUpdates condition type

Catching up with openshift/enhancements@c446cd7846
(enhancements/update/targeted-update-edge-blocking: Drop Evaluating,
2023-06-07, openshift/enhancements#1420), which points out that this
type was never implemented, because Recommended=Unknown is sufficient
to say "we're trying (and failing) to figure out if some of the
target's risks apply to the cluster".

config/v1/types_cluster_version.go

@@ -691,7 +691,6 @@ type ConditionalUpdate struct {
 
 	// conditions represents the observations of the conditional update's
 	// current status. Known types are:
-	// * Evaluating, for whether the cluster-version operator will attempt to evaluate any risks[].matchingRules.
 	// * Recommended, for whether the update is recommended for the current cluster.
 	// +patchMergeKey=type
 	// +patchStrategy=merge