fix: update region codes in revenue conversion; remove unused field from student revenue query

src/libs/convert/revenue.js

@@ -21,14 +21,12 @@ along with simcaq-node.  If not, see <https://www.gnu.org/licenses/>.
 module.exports = function regionCode(id) {
     switch (id) {
         case 1:
-        return 'Receitas';
-        case 2:
         return 'Rede pública (anual)'
-        case 3:
+        case 2:
         return 'Rede pública (mensal)';
-        case 4:
+        case 3:
         return 'Rede pública e conveniada (anual)';
-        case 5:
+        case 4:
         return 'Rede pública e conveniada (mensal)';
     }
 };