Clean up code, remove unused methods.

app/Mail/AccessTokenCreatedMail.php

@@ -27,7 +27,6 @@ namespace FireflyIII\Mail;
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Queue\SerializesModels;
-use Laravel\Passport\Token;
 
 /**
  * Class AccessTokenCreatedMail
@@ -47,7 +46,6 @@ class AccessTokenCreatedMail extends Mailable
      *
      * @param string $email
      * @param string $ipAddress
-     * @param Token  $token
      */
     public function __construct(string $email, string $ipAddress)
     {
@@ -60,7 +58,7 @@ class AccessTokenCreatedMail extends Mailable
      *
      * @return $this
      */
-    public function build()
+    public function build(): self
     {
         return $this->view('emails.access-token-created-html')->text('emails.access-token-created-text')
                     ->subject('A new access token was created');

app/Mail/AdminTestMail.php

@@ -57,7 +57,7 @@ class AdminTestMail extends Mailable
      *
      * @return $this
      */
-    public function build()
+    public function build(): self
     {
         return $this->view('emails.admin-test-html')->text('emails.admin-test-text')
                     ->subject('A test message from your Firefly III installation');

app/Mail/ConfirmEmailChangeMail.php

@@ -65,7 +65,7 @@ class ConfirmEmailChangeMail extends Mailable
      *
      * @return $this
      */
-    public function build()
+    public function build(): self
     {
         return $this->view('emails.confirm-email-change-html')->text('emails.confirm-email-change-text')
                     ->subject('Your Firefly III email address has changed');

app/Mail/RegisteredUser.php

@@ -57,7 +57,7 @@ class RegisteredUser extends Mailable
      *
      * @return $this
      */
-    public function build()
+    public function build(): self
     {
         return $this->view('emails.registered-html')->text('emails.registered-text')->subject('Welcome to Firefly III!');
     }

app/Mail/ReportNewJournalsMail.php

@@ -65,7 +65,7 @@ class ReportNewJournalsMail extends Mailable
      */
     public function build(): self
     {
-        $subject = $this->journals->count() === 1
+        $subject = 1 === $this->journals->count()
             ? 'Firefly III has created a new transaction'
             : sprintf(
                 'Firefly III has created new %d transactions', $this->journals->count()

app/Mail/RequestedNewPassword.php

@@ -56,7 +56,7 @@ class RequestedNewPassword extends Mailable
      *
      * @return $this
      */
-    public function build()
+    public function build(): self
     {
         return $this->view('emails.password-html')->text('emails.password-text')->subject('Your password reset request');
     }

app/Mail/UndoEmailChangeMail.php

@@ -63,7 +63,7 @@ class UndoEmailChangeMail extends Mailable
      *
      * @return $this
      */
-    public function build()
+    public function build(): self
     {
         return $this->view('emails.undo-email-change-html')->text('emails.undo-email-change-text')
                     ->subject('Your Firefly III email address has changed');