Remove unused includes

examples/basic.cc

@@ -1,5 +1,7 @@
 #include "../lmdb-safe.hh"
 
+#include <iostream>
+
 using namespace std;
 using namespace LMDBSafe;
 

examples/multi.cc

@@ -2,6 +2,8 @@
 
 #include <unistd.h>
 
+#include <iostream>
+
 using namespace std;
 using namespace LMDBSafe;
 

examples/rel.cc

@@ -5,6 +5,7 @@
 
 #include <c++utilities/application/global.h>
 
+#include <iostream>
 #include <sstream>
 
 using namespace std;

examples/resize.cc

@@ -1,6 +1,7 @@
 #include "../lmdb-safe.hh"
 
 #include <cstring>
+#include <iostream>
 
 using namespace std;
 using namespace LMDBSafe;

examples/scale.cc

@@ -2,6 +2,8 @@
 
 #include <c++utilities/conversion/stringconversion.h>
 
+#include <iostream>
+
 using namespace std;
 using namespace LMDBSafe;
 

examples/typed.cc

@@ -5,6 +5,7 @@
 
 #include <arpa/inet.h>
 
+#include <iostream>
 #include <string>
 
 using namespace std;

lmdb-safe.hh

@@ -6,13 +6,10 @@
 
 #include <algorithm>
 #include <cstring>
-#include <fstream>
-#include <iostream>
 #include <limits>
 #include <map>
 #include <memory>
 #include <mutex>
-#include <set>
 #include <stdexcept>
 #include <string>
 #include <thread>