Sketcher: Remove StopOperation from toolbar (#7569)

Rarely used, see poll at https://forum.freecadweb.org/viewtopic.php?f=8&t=71922

Co-authored-by: Paddle <PaddleStroke@users.noreply.github.com>

src/Mod/Sketcher/Gui/Workbench.cpp

@@ -165,8 +165,7 @@ inline void SketcherAddWorkspaceSketchExtra<Gui::ToolBarItem>(Gui::ToolBarItem&
     sketch  << "Sketcher_ReorientSketch"
             << "Sketcher_ValidateSketch"
             << "Sketcher_MergeSketches"
-            << "Sketcher_MirrorSketch"
-            << "Sketcher_StopOperation";
+            << "Sketcher_MirrorSketch";
 }
 
 template <typename T>