chore: remove deprecated AppiumBy.WINDOWS_UI_AUTOMATION (#968)

Author: KazuCocoa

appium/webdriver/common/appiumby.py

@@ -23,8 +23,6 @@ class AppiumBy(By):
     ANDROID_VIEWTAG = '-android viewtag'
     ANDROID_DATA_MATCHER = '-android datamatcher'
     ANDROID_VIEW_MATCHER = '-android viewmatcher'
-    # Deprecated
-    WINDOWS_UI_AUTOMATION = '-windows uiautomation'
     ACCESSIBILITY_ID = 'accessibility id'
     IMAGE = '-image'
     CUSTOM = '-custom'

appium/webdriver/webdriver.py

@@ -245,7 +245,6 @@ def __init__(
         By.IOS_CLASS_CHAIN = AppiumBy.IOS_CLASS_CHAIN
         By.ANDROID_UIAUTOMATOR = AppiumBy.ANDROID_UIAUTOMATOR
         By.ANDROID_VIEWTAG = AppiumBy.ANDROID_VIEWTAG
-        By.WINDOWS_UI_AUTOMATION = AppiumBy.WINDOWS_UI_AUTOMATION
         By.ACCESSIBILITY_ID = AppiumBy.ACCESSIBILITY_ID
         By.IMAGE = AppiumBy.IMAGE
         By.CUSTOM = AppiumBy.CUSTOM