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/sat/smt/array_diagnostics.cpp

@@ -93,8 +93,10 @@ namespace array {
                         validate_extensionality(n, k);
             }
             expr* x = nullptr, *y = nullptr;
+#if 0
             if (m.is_eq(n->get_expr(), x, y) && a.is_array(x))
                 std::cout << ctx.bpp(n) << " " << s().value(n->bool_var()) << "\n";
+#endif
             if (m.is_eq(n->get_expr(), x, y) && a.is_array(x) && s().value(n->bool_var()) == l_false)
                 validate_extensionality(expr2enode(x), expr2enode(y));
         }        

src/sat/smt/bv_invariant.cpp

@@ -93,6 +93,7 @@ namespace bv {
         } while (curr != v);
 
         zero_one_bits const& _bits = m_zero_one_bits[v];
+#if 0
         if (_bits.size() != num_bits) {
             std::cout << "v" << v << " " << _bits.size() << " " << num_bits << "\n";
             std::cout << "true: " << mk_true() << "\n";
@@ -102,6 +103,7 @@ namespace bv {
             }
             while (curr != v);
         }
+#endif
         SASSERT(_bits.size() == num_bits);
         VERIFY(_bits.size() == num_bits);
         bool_vector already_found;

src/sat/smt/pb_solver.cpp

@@ -1624,7 +1624,7 @@ namespace pb {
             CTRACE("ba", coeff == 0, display(tout << l << " coeff: " << coeff << "\n", p, true);); 
             
             if (_debug_conflict) {
-                std::cout << "coeff " << coeff << "\n";
+                IF_VERBOSE(0, verbose_stream() << "coeff " << coeff << "\n";);
             }
 
             SASSERT(coeff > 0);
@@ -2256,7 +2256,7 @@ namespace pb {
         SASSERT(c.lit() == sat::null_literal || c.is_watched(*this, c.lit()));
 
         // pre-condition is that the literals, except c.lit(), in c are unwatched.
-        if (c.id() == _bad_id) std::cout << "recompile: " << c << "\n";
+        //if (c.id() == _bad_id) std::cout << "recompile: " << c << "\n";
         m_weights.resize(2*s().num_vars(), 0);
         for (literal l : c) {
             ++m_weights[l.index()];

src/sat/smt/q_model_fixer.cpp

@@ -302,9 +302,10 @@ namespace q {
             return md->v2t[md->values[j]];
         };
         
+#if 0
         for (unsigned j = 0; j < sz; ++j)
             std::cout << mk_pp(md->values[j], m) << "\n";
-
+#endif
 
         expr* arg = t->get_arg(i);