Don't submit schemaType when creating a new schema. It's made for backward compatibility with its API

kafka-ui-api/src/main/java/com/provectus/kafka/ui/cluster/model/schemaregistry/InternalNewSchema.java

@@ -1,16 +1,13 @@
 package com.provectus.kafka.ui.cluster.model.schemaregistry;
 
 import com.provectus.kafka.ui.model.NewSchemaSubject;
-import com.provectus.kafka.ui.model.SchemaType;
 import lombok.Data;
 
 @Data
 public class InternalNewSchema {
     private String schema;
-    private SchemaType schemaType;
 
     public InternalNewSchema(NewSchemaSubject schemaSubject) {
         this.schema = schemaSubject.getSchema();
-        this.schemaType = schemaSubject.getSchemaType();
     }
 }