Remove deprecated mqtrigger with kind fission (#2875)

* Remove deprecated mqtrigger with kind fission
* Remove unused deps

---------

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

pkg/mqtrigger/validator/validator.go

@@ -16,13 +16,7 @@ limitations under the License.
 
 package validator
 
-import (
-	"sync"
-)
-
 var (
-	topicValidators      = make(map[string]TopicValidator)
-	lock                 = sync.Mutex{}
 	kedaMqTypeValidators = map[string]bool{
 		"kafka":              true,
 		"aws-sqs-queue":      true,
@@ -35,41 +29,13 @@ var (
 	}
 )
 
-type (
-	TopicValidator func(topic string) bool
-)
-
-func Register(mqType string, validator TopicValidator) {
-	lock.Lock()
-	defer lock.Unlock()
-
-	if validator == nil {
-		panic("Nil message queue topic validator")
-	}
-
-	_, registered := topicValidators[mqType]
-	if registered {
-		panic("Message queue topic validator already register")
-	}
-
-	topicValidators[mqType] = validator
-}
-
-func IsValidTopic(mqType, topic, mqtKind string) bool {
-	if mqtKind == "keda" {
-		return true
-	}
-	validator, registered := topicValidators[mqType]
-	if !registered {
-		return false
-	}
-	return validator(topic)
+func IsValidTopic(mqtKind string) bool {
+	return mqtKind == "keda"
 }
 
 func IsValidMessageQueue(mqType, mqtKind string) bool {
 	if mqtKind == "keda" {
 		return kedaMqTypeValidators[mqType]
 	}
-	_, registered := topicValidators[mqType]
-	return registered
+	return false
 }