Cambios menores: limpieza de imports.

pom.xml

@@ -14,7 +14,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.3.4.RELEASE</version>
+        <version>2.5.5</version>
     </parent>
 
     <dependencies>

src/main/java/es/ujaen/dae/ujacoin/servicios/ServicioUjaCoin.java

@@ -26,7 +26,6 @@ import javax.validation.Valid;
 import javax.validation.constraints.NotBlank;
 import javax.validation.constraints.NotNull;
 import javax.validation.constraints.Positive;
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.validation.annotation.Validated;
 

src/test/java/es/ujaen/dae/ujacoin/entidades/CuentaTest.java

@@ -11,7 +11,8 @@ import es.ujaen.dae.ujacoin.entidades.movimientos.TransferenciaEmitida;
 import es.ujaen.dae.ujacoin.entidades.movimientos.TransferenciaRecibida;
 import java.time.LocalDate;
 import org.assertj.core.api.Assertions;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
+
 
 /**
  *