Un-break the test and untie serving code in dash example

src/fs.h

@@ -40,7 +40,3 @@ void mg_fs_close(struct mg_fd *fd);
 char *mg_file_read(struct mg_fs *fs, const char *path, size_t *size);
 bool mg_file_write(struct mg_fs *fs, const char *path, const void *, size_t);
 bool mg_file_printf(struct mg_fs *fs, const char *path, const char *fmt, ...);
-
-// API for the embedded (packed) filesystem
-const char *mg_unpack(const char *path, size_t *size, time_t *mtime);
-const char *mg_unlist(size_t no);