fix(docs): remove visual regression cypress plugin with sharp

Author: thejackshelton

package.json

@@ -39,7 +39,6 @@
     "@floating-ui/core": "1.4.1",
     "@floating-ui/dom": "^1.5.1",
     "@fontsource-variable/inter": "5.0.8",
-    "@frsource/cypress-plugin-visual-regression-diff": "^3.3.10",
     "@jscutlery/semver": "^3.1.0",
     "@k11r/nx-cloudflare-wrangler": "2.7.1",
     "@nx/cypress": "17.1.3",