deleted method 'required()'

Author: sergeycherkasovv

app/src/main/java/hexlet/code/schemas/NumberSchema.java

@@ -1,14 +1,8 @@
 package hexlet.code.schemas;
 
-import java.util.Objects;
 
 public final class NumberSchema extends BaseSchema<Integer> {
 
-    public NumberSchema required() {
-        addValidation("required", Objects::nonNull);
-        return this;
-    }
-
     public NumberSchema range(int begin, int end) {
         addValidation("range", i -> begin <= i && i <= end);
         return this;