refactor: finished converting sass colors in _variables.scss

stylesheets/_session_conversation.scss

@@ -398,7 +398,7 @@
           border: 2px solid #161819;
         }
 
-        background-color: $session-shade-1-alt;
+        background-color: var(--color-darkest-gray-color);
         border: 2px solid #161819;
       }
     }

stylesheets/_variables.scss

@@ -1,28 +1,3 @@
-// Loki colors
-$color-loki-dark-gray: #323232;
-$color-loki-extra-dark-gray: #101010;
-$color-loki-green-dark: #32b10e;
-$color-loki-green-gradient: linear-gradient(to right, rgb(120, 190, 32) 0%, rgb(0, 133, 34) 100%);
-
-$color-white-02: rgba(var(--color-white-color-rgb), 0.2);
-$color-white-04: rgba(var(--color-white-color-rgb), 0.4);
-$color-white-05: rgba(var(--color-white-color-rgb), 0.5);
-$color-white-06: rgba(var(--color-white-color-rgb), 0.6);
-$color-white-07: rgba(var(--color-white-color-rgb), 0.7);
-$color-white-075: rgba(var(--color-white-color-rgb), 0.75);
-$color-white-08: rgba(var(--color-white-color-rgb), 0.8);
-$color-light-20: #c1c5cd;
-$color-light-90: #070c14;
-
-$color-dark-72: #31343c;
-$color-dark-90: #121417;
-$color-black-008: rgba(var(--color-black-color-rgb), 0.08);
-$color-black-005: rgba(var(--color-black-color-rgb), 0.05);
-$color-black-012: rgba(var(--color-black-color-rgb), 0.12);
-$color-black-04: rgba(var(--color-black-color-rgb), 0.4);
-
-// Old colors
-
 // A few layout variables used cross-file
 
 $header-height: 55px;