Remove superfluous arg

src/Composer/Downloader/GitDownloader.php

@@ -135,7 +135,7 @@ class GitDownloader extends VcsDownloader implements DvcsDownloaderInterface
             $this->setPushUrl($path, $url);
         }
 
-        if ($newRef = $this->updateToCommit($package, $path, (string) $ref, $package->getPrettyVersion(), $package->getReleaseDate())) {
+        if ($newRef = $this->updateToCommit($package, $path, (string) $ref, $package->getPrettyVersion())) {
             if ($package->getDistReference() === $package->getSourceReference()) {
                 $package->setDistReference($newRef);
             }
@@ -186,7 +186,7 @@ class GitDownloader extends VcsDownloader implements DvcsDownloaderInterface
         };
 
         $this->gitUtil->runCommand($commandCallable, $url, $path);
-        if ($newRef = $this->updateToCommit($target, $path, (string) $ref, $target->getPrettyVersion(), $target->getReleaseDate())) {
+        if ($newRef = $this->updateToCommit($target, $path, (string) $ref, $target->getPrettyVersion())) {
             if ($target->getDistReference() === $target->getSourceReference()) {
                 $target->setDistReference($newRef);
             }