Fix psalm errors

src/Helpers/NetworkHelper.php

@@ -8,7 +8,6 @@ class NetworkHelper
 {
     public function resolveClientIpAddress(string $clientIpAddress = null): ?string
     {
-        /** @var string|null $clientIpAddress */
         $clientIpAddress = $clientIpAddress ??
             $_SERVER['HTTP_CLIENT_IP'] ??
             $_SERVER['HTTP_X_FORWARDED_FOR'] ??

src/ModuleConfiguration.php

@@ -465,7 +465,6 @@ class ModuleConfiguration
 
     public function getTrackerDataRetentionPolicy(): ?DateInterval
     {
-        /** @var string|null $value */
         $value = $this->getConfiguration()
             ->getOptionalString(self::OPTION_TRACKER_DATA_RETENTION_POLICY, null);
 

src/Trackers/Authentication/DoctrineDbal/Versioned/Tracker.php

@@ -99,17 +99,6 @@ class Tracker implements AuthenticationDataTrackerInterface, AuthenticationDataP
     {
         $dateTime = (new DateTimeImmutable())->sub($retentionPolicy);
 
-        if ($dateTime === false) {
-            // @codeCoverageIgnoreStart
-            $message = sprintf(
-                'Could not create DateTime instance for data retention policy enforcement. Retention policy was: %s.',
-                var_export($retentionPolicy, true)
-            );
-            $this->logger->error($message);
-            throw new InvalidConfigurationException($message);
-            // @codeCoverageIgnoreEnd
-        }
-
         $this->dataStore->deleteDataOlderThan($dateTime);
     }
 }