xrd: Fixed missing Metadata ipmort

Author: Somerandomguy10111

reqs.txt

@@ -1,6 +1,6 @@
 import numpy as np
 
-from xrdpattern.xrd import XrdData, XrdAnode, XrayInfo
+from xrdpattern.xrd import XrdData, XrayInfo
 
 
 class DatParser:

xrdpattern/parsing/dat/dat_parser.py

@@ -1,3 +1,4 @@
 from .experiment import XrayInfo, PowderExperiment, LabelType
 from .data import XrdData
+from .metadata import Metadata
 from .xray import XrdAnode, XrayInfo

xrdpattern/parsing/examples/aimat.json

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import math
 from dataclasses import dataclass
 from enum import Enum
 from typing import Optional