优化了部分代码结构

func/Module_mainwindow.py

@@ -5,7 +5,6 @@ from PySide6.QtCore import Qt
 from PySide6.QtWidgets import QMainWindow, QMessageBox, QFileDialog, QApplication, QWidget
 from PySide6.QtGui import QGuiApplication
 from matplotlib import use
-from matplotlib.backends.backend_qt import NavigationToolbar2QT
 from yaml import dump, load, FullLoader
 
 from func.utils.PublicFunc import PublicFunc