Fix PHPStan error

Author: piurafunk

src/StreamReader.php

@@ -77,11 +77,6 @@ public function getIterator(): Iterator
                     throw new RuntimeException('Unable to create temporary stream.');
                 }
 
-                // Empty content means nothing to transport, nothing to seek
-                if (!$contentSize) {
-                    return $stream;
-                }
-
                 $bytes = stream_copy_to_stream($this->stream, $stream, $contentSize);
 
                 if ($bytes !== $contentSize) {
@@ -127,19 +122,17 @@ public function getIterator(): Iterator
             if (!$usage->used()) {
                 $usage->use();
                 $content->close();
-                if ($contentSize) {
-                    // Skip unused content
-                    $bytes = fseek($this->stream, $contentSize + $contentPadding, SEEK_CUR);
-
-                    if ($bytes === -1) {
-                        throw new InvalidArchiveFormatException(
-                            sprintf(
-                                'Invalid TAR archive format: Unexpected end of file at position: %s, expected %d bytes of content and block padding',
-                                $blockStart,
-                                $contentSize + $contentPadding,
-                            )
-                        );
-                    }
+                // Skip unused content
+                $bytes = fseek($this->stream, $contentSize + $contentPadding, SEEK_CUR);
+
+                if ($bytes === -1) {
+                    throw new InvalidArchiveFormatException(
+                        sprintf(
+                            'Invalid TAR archive format: Unexpected end of file at position: %s, expected %d bytes of content and block padding',
+                            $blockStart,
+                            $contentSize + $contentPadding,
+                        )
+                    );
                 }
             }
         }