docs: fix common chart option labelLayout

Author: xuefei1313

docs/assets/option/en/chart/common.md

@@ -258,7 +258,3 @@ Whether to enable automatic bandSize. If enabled, the bandSize will be automatic
 ### extend(number)
 
 The expansion value added after calculating the bandSize based on barWidth to fix the overall length of the axis. The unit is px.
-
-## labelLayout(string)='series'
-
-By default, it is laid out separately by series, and can be set to 'series' or 'region'. When set to `region`, the label of different series in the same region will be calculated together to prevent overlap.

docs/assets/option/zh/chart/common.md

@@ -202,7 +202,3 @@ IGaugePointerSeriesSpec-->
 ### extend(number)
 
 根据 barWidth 计算出 bandSize，从而固定轴整体长度之后，添加的扩增值。单位为 px。
-
-## labelLayout(string)='series'
-
-标签布局方式。默认按照系列单独布局，可设置为'series' 或 'region'。当设置为 region 时，相同 region 的系列标签会共同进行防重叠计算。