Kludge: work around lack of syscall.seek on 386 and arm, #1906

Revert this once syscall.seek is implemented
cf. https://github.com/tinygo-org/tinygo/issues/1906

src/os/stat_unix.go

@@ -15,20 +15,6 @@ func (f *File) Sync() error {
 	return ErrNotImplemented
 }
 
-// Stat returns the FileInfo structure describing file.
-// If there is an error, it will be of type *PathError.
-func (f *File) Stat() (FileInfo, error) {
-	var fs fileStat
-	err := ignoringEINTR(func() error {
-		return syscall.Fstat(int(f.handle.(unixFileHandle)), &fs.sys)
-	})
-	if err != nil {
-		return nil, &PathError{Op: "fstat", Path: f.name, Err: err}
-	}
-	fillFileStatFromSys(&fs, f.name)
-	return &fs, nil
-}
-
 // statNolog stats a file with no test logging.
 func statNolog(name string) (FileInfo, error) {
 	var fs fileStat