fix(grid): toolbar color (#503)

Author: SisIvanova

sass/themes/schemas/components/light/_grid-toolbar.scss

@@ -107,7 +107,6 @@ $material-grid-toolbar: extend(
 /// Generates a fluent grid-toolbar schema.
 /// @type {Map}
 /// @prop {Map} background-color [color: 'surface'] - The toolbar background color.
-/// @prop {Map} title-text-color [color: ('gray', 700)] - The toolbar title text color.
 /// @requires {Map} $light-grid-toolbar
 $fluent-grid-toolbar: extend(
     $light-grid-toolbar,
@@ -116,13 +115,6 @@ $fluent-grid-toolbar: extend(
             color: 'surface',
         ),
 
-        title-text-color: (
-            color: (
-                'gray',
-                700,
-            ),
-        ),
-
         _meta: (
             theme: 'fluent',
             variant: 'light',
@@ -132,18 +124,11 @@ $fluent-grid-toolbar: extend(
 
 /// Generates a bootstrap grid-toolbar schema.
 /// @type {Map}
-/// @prop {Map} title-text-color [color: ('gray', 600)] - The toolbar title text color.
 /// @prop {Map} border-color [color: ('gray', 100)] - The toolbar border-bottom color.
 /// @requires {Map} $light-grid-toolbar
 $bootstrap-grid-toolbar: extend(
     $light-grid-toolbar,
     (
-        title-text-color: (
-            color: (
-                'gray',
-                600,
-            ),
-        ),
         border-color: (
             color: (
                 'gray',