FIX: not add speed smooth area

Jira: none

Signed-off-by: qing.zhang <qing.zhang@bambulab.com>
Change-Id: Ifadbbc52a718b345d3ed0f3bd678abc269a46424

src/libslic3r/ExtrusionEntity.cpp

@@ -68,8 +68,7 @@ void ExtrusionPath::polygons_covered_by_spacing(Polygons &out, const float scale
 
 bool ExtrusionPath::can_merge(const ExtrusionPath& other)
 {
-    return overhang_degree == other.overhang_degree &&
-            curve_degree==other.curve_degree &&
+    return  curve_degree==other.curve_degree &&
             mm3_per_mm == other.mm3_per_mm &&
             width == other.width &&
             height == other.height &&