no bold fonts

gtk-3.0/_common.scss

@@ -1033,7 +1033,6 @@ GtkComboBox {
   }
 
   .title {
-    font-weight: bold;
     padding: 0px 12px;
   }
 
@@ -1669,7 +1668,6 @@ column-header.button.dnd { // for treeview-like derive widgets
     }
     GtkLabel { //tab text
       padding: 0 2px; // needed for a nicer focus ring
-      font-weight: bold;
       color: $insensitive_fg_color;
     }
     .prelight-page GtkLabel, GtkLabel.prelight-page {

gtk-3.0/gtk-contained.css

@@ -784,7 +784,6 @@ GtkComboBox {
     color: rgba(82, 93, 118, 0.5);
     background-color: rgba(239, 240, 242, 0.95); }
   .header-bar .title {
-    font-weight: bold;
     padding: 0px 12px; }
   .header-bar .subtitle {
     font-size: smaller;
@@ -1343,7 +1342,6 @@ column-header .button, column-header .button:hover, column-header .button:active
           background-color: rgba(0, 0, 0, 0.02); }
     .notebook tab GtkLabel {
       padding: 0 2px;
-      font-weight: bold;
       color: rgba(92, 97, 108, 0.55); }
     .notebook tab .prelight-page GtkLabel, .notebook tab GtkLabel.prelight-page {
       color: rgba(92, 97, 108, 0.775); }