fix(driver): remove system popup cancel step from load/unload flow

以后装货/卸货流程不再有系统弹窗,去掉对应的取消弹窗点击步骤
(cancel_btn 定位器 + 两处流程步骤 + docstring 描述同步)。

tests/pages/driver/freight_flow_page.py

@@ -39,9 +39,6 @@ class DriverFreightFlowPage(AppBasePage):
         # ── 接单 ──
         self.accept_order_btn = (AppiumBy.ID, "com.arpa.ynchenggangdriver:id/tv_bian")
 
-        # ── 系统弹窗取消 ──
-        self.cancel_btn = (AppiumBy.ID, "android:id/button2")
-
         # ── 吨位 ──
         self.weight_input = (AppiumBy.ID, "com.arpa.ynchenggangdriver:id/et_dun")
 
@@ -137,8 +134,6 @@ class DriverFreightFlowPage(AppBasePage):
         """装货完整流程。"""
         self._tap_by_text("装货")                           # ⑥ 点击装货
         self.driver.implicitly_wait(1)
-        self._wait_and_click(self.cancel_btn)               # ⑦ 点击取消（系统弹窗）
-        self.driver.implicitly_wait(1)
         self._wait_and_fill(self.weight_input, weight)      # ⑧ 输入吨位
         self._wait_and_click(self.select_image_btn)         # ⑨ 选择图片
         self.driver.implicitly_wait(1)
@@ -164,8 +159,6 @@ class DriverFreightFlowPage(AppBasePage):
         """卸货完整流程。"""
         self._tap_by_text("卸货")                           # ⑲ 点击卸货
         self.driver.implicitly_wait(1)
-        self._wait_and_click(self.cancel_btn)               # ⑳ 点击取消（系统弹窗）
-        self.driver.implicitly_wait(1)
         self._wait_and_fill(self.weight_input, weight)      # ㉑ 输入吨位
         self._wait_and_click(self.select_image_btn)         # ㉒ 选择图片
         self.driver.implicitly_wait(1)