fix linter errors

Author: vursen

packages/grid/src/styles/vaadin-grid-base-styles.js

@@ -164,6 +164,7 @@ export const gridStyles = css`
 
   /* Row and cell borders */
 
+  /* stylelint-disable-next-line no-duplicate-selectors */
   #header,
   #footer {
     &::before {
@@ -193,6 +194,7 @@ export const gridStyles = css`
     scroll-margin-block-end: var(--_row-border-width);
   }
 
+  /* stylelint-disable-next-line no-duplicate-selectors */
   [part~='cell'] {
     border-block: var(--_row-border-width) var(--_border-color);
     border-inline: var(--_column-border-width) var(--_border-color);
@@ -231,10 +233,12 @@ export const gridStyles = css`
 
   /* Row and cell background */
 
+  /* stylelint-disable-next-line no-duplicate-selectors */
   [part~='row'] {
     background: var(--vaadin-grid-row-background-color, var(--vaadin-background-color));
   }
 
+  /* stylelint-disable-next-line no-duplicate-selectors */
   [part~='cell'] {
     background-color: inherit;
     background-repeat: no-repeat;