remove '#include <iostream>' from headers and from unneeded places

It's harmful to have iostream everywhere as it injects functions in the compiled files

src/smt/smt_context.cpp

@@ -42,6 +42,7 @@ Revision History:
 #include "smt/smt_model_finder.h"
 #include "smt/smt_parallel.h"
 #include "smt/smt_arith_value.h"
+#include <iostream>
 
 namespace smt {
 
@@ -3943,8 +3944,7 @@ namespace smt {
         if (m_fparams.m_model_on_final_check) {
             mk_proto_model();
             model_pp(std::cout, *m_proto_model);
-            std::cout << "END_OF_MODEL\n";
-            std::cout.flush();
+            std::cout << "END_OF_MODEL" << std::endl;
         }
 
         m_stats.m_num_final_checks++;

src/smt/smt_context_stat.cpp

@@ -136,9 +136,9 @@ namespace smt {
     }
 
     void context::display_profile_res_sub(std::ostream & out) const {
-        display_var_occs_histogram(std::cerr);
-        display_num_min_occs(std::cerr);
-        std::cerr << "\n";
+        display_var_occs_histogram(out);
+        display_num_min_occs(out);
+        out << "\n";
     }
 
     void context::display_profile(std::ostream & out) const {

src/smt/smt_statistics.h

@@ -18,8 +18,6 @@ Revision History:
 --*/
 #pragma once
 
-#include<iostream>
-
 namespace smt {
 
     struct statistics {

src/smt/theory_array_bapa.cpp

@@ -272,12 +272,14 @@ namespace smt {
             std::cout << smt << "\n";
             std::cout << tns << "\n";
 #endif
+#if 0
             if (tns == sz1) {
                 std::cout << "SEEN " << tms << "\n";
             }
             if (tns == sz2) {
                 std::cout << "SEEN " << smt << "\n";                
             }
+#endif
             ctx().push_trail(value_trail<bool>(i1.m_is_leaf, false));
             ctx().push_trail(value_trail<bool>(i2.m_is_leaf, false));
             expr_ref k1(m), k2(m), k3(m);

src/smt/theory_pb.cpp

@@ -1598,10 +1598,12 @@ namespace smt {
         lbool is_sat = k.check();
         validating = false;
         // std::cout << is_sat << "\n";
+#if 0
         if (is_sat == l_true) {
             std::cout << A << "\n";
             std::cout << B << "\n";
         }
+#endif
         SASSERT(is_sat != l_true);
         return true;
     }