Don't update min size in wxBoxSizer::RecalcSizes()

This seems to be just unnecessary as RecalcSizes() is only supposed to
reposition the child elements and CalcMin() will be called later again if the
min size needs to be recomputed.

src/common/sizer.cpp

@@ -2211,9 +2211,6 @@ void wxBoxSizer::RecalcSizes()
         minMajorSize += GetSizeInMajorDir(item->GetMinSizeWithBorder());
     }
 
-    // update our min size have changed
-    SizeInMajorDir(m_minSize) = minMajorSize;
-
 
     // space and sum of proportions for the remaining items, both may change
     // below