[JENKINS-70779] Address Stylelint 15.x Deprecations (#7769)

These rules will still work in the current release of stylelint, but they would be removed in the next major release.

war/.stylelintrc.js

@@ -2,13 +2,6 @@ module.exports = {
   extends: "stylelint-config-standard",
   customSyntax: "postcss-less",
   rules: {
-    indentation: null,
-    linebreaks: "unix",
-    "max-line-length": 150,
-    "selector-list-comma-newline-after": null,
-    "selector-list-comma-space-after": null,
-    "value-list-comma-newline-after": null,
-    "declaration-colon-newline-after": null,
     "no-descending-specificity": null,
     "selector-class-pattern": "[a-z]",
     "selector-id-pattern": "[a-z]",
@@ -20,7 +13,6 @@ module.exports = {
         camelCaseSvgKeywords: true,
       },
     ],
-    "string-quotes": "double",
     "property-no-vendor-prefix": null,
     "at-rule-no-vendor-prefix": null,
     "color-function-notation": "legacy",