phar: Remove obsoleted workaround code (#20136)

Author: ndossche

ext/phar/zip.c

@@ -641,13 +641,6 @@ int phar_parse_zipfile(php_stream *fp, char *fname, size_t fname_len, char *alia
 
 			zend_off_t restore_pos = php_stream_tell(fp);
 			php_stream_seek(fp, entry.offset, SEEK_SET);
-			/* these next lines should be for php < 5.2.6 after 5.3 filters are fixed */
-			fp->writepos = 0;
-			fp->readpos = 0;
-			php_stream_seek(fp, entry.offset, SEEK_SET);
-			fp->writepos = 0;
-			fp->readpos = 0;
-			/* the above lines should be for php < 5.2.6 after 5.3 filters are fixed */
 
 			mydata->alias_len = entry.uncompressed_filesize;
 			if (entry.flags & PHAR_ENT_COMPRESSED_GZ) {