Remove unnecessary empty usages

Author: ostrolucky

AbstractBrowser.php

@@ -531,7 +531,7 @@ public function reload(): Crawler
      */
     public function followRedirect(): Crawler
     {
-        if (empty($this->redirect)) {
+        if (!$this->redirect) {
             throw new LogicException('The request was not redirected.');
         }
 

Cookie.php

@@ -71,7 +71,7 @@ public function __construct(
             $this->value = $value ?? '';
             $this->rawValue = rawurlencode($this->value);
         }
-        $this->path = empty($path) ? '/' : $path;
+        $this->path = $path ?: '/';
 
         if (null !== $expires) {
             $timestampAsDateTime = \DateTimeImmutable::createFromFormat('U', $expires);

CookieJar.php

@@ -71,7 +71,7 @@ public function expire(string $name, ?string $path = '/', ?string $domain = null
     {
         $path ??= '/';
 
-        if (empty($domain)) {
+        if (!$domain) {
             // an empty domain means any domain
             // this should never happen but it allows for a better BC
             $domains = array_keys($this->cookieJar);