fix: linter issues

src/test/kotlin/pt/up/fe/ni/website/backend/service/EmailServiceTest.kt

@@ -2,20 +2,16 @@ package pt.up.fe.ni.website.backend.service
 
 import jakarta.mail.Session
 import jakarta.mail.internet.MimeMessage
-import java.io.File
 import org.junit.jupiter.api.Assertions
-import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.extension.ExtendWith
 import org.mockito.ArgumentCaptor
-import org.mockito.ArgumentMatchers.any
 import org.mockito.Mockito
 import org.mockito.Mockito.times
 import org.mockito.Mockito.verify
 import org.mockito.junit.jupiter.MockitoExtension
 import org.springframework.boot.test.context.SpringBootTest
 import org.springframework.mail.javamail.JavaMailSender
-import org.springframework.mail.javamail.MimeMessageHelper
 import pt.up.fe.ni.website.backend.email.EmailBuilder
 import pt.up.fe.ni.website.backend.email.SimpleEmailBuilder
 
@@ -40,8 +36,8 @@ class EmailServiceTest {
 
         verify(mailSender, times(1)).createMimeMessage()
 
-        val argumentCaptor= ArgumentCaptor.forClass(MimeMessage::class.java)
-        verify(mailSender,times(1)).send(argumentCaptor.capture())
-        Assertions.assertEquals("subject",argumentCaptor.value.subject)
+        val argumentCaptor = ArgumentCaptor.forClass(MimeMessage::class.java)
+        verify(mailSender, times(1)).send(argumentCaptor.capture())
+        Assertions.assertEquals("subject", argumentCaptor.value.subject)
     }
 }