refactor(multiple): clean up vendor prefixes (#24585)

Removes some vendor prefixes that shouldn't be necessary anymore.

Author: crisbeto

src/material-experimental/mdc-table/table.scss

@@ -1,5 +1,4 @@
 @use '@material/data-table/data-table' as mdc-data-table;
-@use '../../material/core/style/vendor-prefixes';
 @use '../mdc-helpers/mdc-helpers';
 @use '../../material/table/table-flex-styles';
 
@@ -13,7 +12,7 @@
   // Note that the table can either set this class or an inline style to make something sticky.
   // We set the style as `!important` so that we get an identical specificity in both cases
   // and to avoid cases where user styles have a higher specificity.
-  @include vendor-prefixes.position-sticky($important: true);
+  position: sticky !important;
 }
 
 .mat-mdc-table {

src/material/core/style/_vendor-prefixes.scss

@@ -1,7 +1,6 @@
 // stylelint-disable material/no-prefixes
 @mixin user-select($value) {
   -webkit-user-select: $value;
-  -moz-user-select: $value;
   user-select: $value;
 }
 
@@ -25,26 +24,11 @@
   }
 }
 
-@mixin cursor-grab {
-  cursor: -webkit-grab;
-  cursor: grab;
-}
-
-@mixin cursor-grabbing {
-  cursor: -webkit-grabbing;
-  cursor: grabbing;
-}
-
 @mixin backface-visibility($value) {
   -webkit-backface-visibility: $value;
   backface-visibility: $value;
 }
 
-@mixin position-sticky($important: false) {
-  position: -webkit-sticky #{if($important, '!important', '')};
-  position: sticky #{if($important, '!important', '')};
-}
-
 @mixin private-color-adjust($value) {
   -webkit-print-color-adjust: $value;
   color-adjust: $value;

src/material/slider/slider.scss

@@ -39,7 +39,7 @@ $focus-ring-size: 30px !default;
 
   &:not(.mat-slider-disabled):active,
   &.mat-slider-sliding:not(.mat-slider-disabled) {
-    @include vendor-prefixes.cursor-grabbing;
+    cursor: grabbing;
   }
 }
 
@@ -116,7 +116,7 @@ $focus-ring-size: 30px !default;
 
 %_mat-slider-cursor {
   .mat-slider:not(.mat-slider-disabled):not(.mat-slider-sliding) & {
-    @include vendor-prefixes.cursor-grab;
+    cursor: grab;
   }
 }
 

src/material/table/table.scss

@@ -1,4 +1,3 @@
-@use '../core/style/vendor-prefixes';
 @use './table-flex-styles';
 
 @include table-flex-styles.private-table-flex-styles();
@@ -54,7 +53,7 @@ th.mat-header-cell, td.mat-cell, td.mat-footer-cell {
   // Note that the table can either set this class or an inline style to make something sticky.
   // We set the style as `!important` so that we get an identical specificity in both cases
   // and to avoid cases where user styles have a higher specificity.
-  @include vendor-prefixes.position-sticky($important: true);
+  position: sticky !important;
 }
 
 .mat-table-fixed-layout {