Remove unnecessary variable assignment from wxBoxSizer::RecalcSizes().

The "delta" variable was assigned a value that was never used afterwards.

Closes #14908.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73240 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/sizer.cpp

@@ -2102,9 +2102,8 @@ void wxBoxSizer::RecalcSizes()
         minMajorSize += GetSizeInMajorDir(item->GetMinSizeWithBorder());
     }
 
-    // update our min size and delta which may have changed
+    // update our min size have changed
     SizeInMajorDir(m_minSize) = minMajorSize;
-    delta = totalMajorSize - minMajorSize;
 
 
     // space and sum of proportions for the remaining items, both may change