Update hello.py to match the article's code

Remove constants to make the code match the example in the article.

Author: lpozo

pyqt-calculator-tutorial/examples/hello.py

@@ -5,22 +5,15 @@
 # 1. Import QApplication, and all the required widgets
 from PyQt6.QtWidgets import QApplication, QLabel, QWidget
 
-WIN_X = 100
-WIN_Y = 100
-WIDTH = 280
-HEIGHT = 80
-LABEL_X = 60
-LABEL_Y = 15
-
 # 2. Create an instance of QApplication
 app = QApplication(sys.argv)
 
 # 3. Create an instance of your application's GUI
 window = QWidget()
 window.setWindowTitle("PyQt App")
-window.setGeometry(WIN_X, WIN_Y, WIDTH, HEIGHT)
+window.setGeometry(100, 100, 280, 80)
 helloMsg = QLabel("<h1>Hello, World!</h1>", parent=window)
-helloMsg.move(LABEL_X, LABEL_Y)
+helloMsg.move(60, 15)
 
 # 4.Show your application's GUI
 window.show()