remove superfluous includes of iostream, use iosfwd instead

src/Mod/Cam/App/ChangeDyna.h

@@ -24,7 +24,7 @@
 #ifndef CHANGEDYNA_H
 #define CHANGEDYNA_H
 
-#include <iostream>
+#include <iosfwd>
 #include <string>
 #include <vector>
 

src/Mod/Mesh/App/Core/Info.cpp

@@ -25,7 +25,7 @@
 
 #ifndef _PreComp_
 # include <iomanip>
-# include <ios>
+# include <iostream>
 # include <map>
 # include <set>
 #endif

src/Mod/Mesh/App/Core/MeshKernel.h

@@ -25,7 +25,7 @@
 #define MESH_KERNEL_H
 
 #include <assert.h>
-#include <iostream>
+#include <iosfwd>
 
 #include "Elements.h"
 #include "Helpers.h"

src/Mod/Part/App/TopoShape.h

@@ -24,7 +24,7 @@
 #ifndef PART_TOPOSHAPE_H
 #define PART_TOPOSHAPE_H
 
-#include <iostream>
+#include <iosfwd>
 #include <TopoDS_Compound.hxx>
 #include <TopoDS_Wire.hxx>
 #include <TopTools_ListOfShape.hxx>

src/Mod/TechDraw/App/EdgeWalker.h

@@ -29,8 +29,6 @@
 #define TECHDRAW_EDGEWALKER_H
 
 #include <vector>
-#include <iostream>
-
 #include <boost/graph/adjacency_list.hpp>
 #include <boost/graph/properties.hpp>
 #include <boost/graph/graph_traits.hpp>
@@ -94,7 +92,7 @@ public:
 
     std::vector<WalkerEdge>  wedges;      //[WE] representing 1 wire
     void push_back(WalkerEdge w);
-    void clear() {wedges.clear();};
+    void clear() {wedges.clear();}
     int size(void);
 };
 

src/Mod/TechDraw/App/HatchLine.h

@@ -25,9 +25,6 @@
 #ifndef _TechDraw_HATCHLINE_H_
 #define _TechDraw_HATCHLINE_H_
 
-#include <iostream>
-#include <sstream>
-#include <fstream>
 #include <vector>
 #include <string>
 

src/Mod/TechDraw/App/LineGroup.h

@@ -25,9 +25,6 @@
 #ifndef _TechDraw_LINEGROUP_H_
 #define _TechDraw_LINEGROUP_H_
 
-#include <iostream>
-#include <sstream>
-#include <fstream>
 #include <string>
 
 namespace TechDraw