breaking: remove browserhacks analysis

[bartveneman]

• Removes 150 SLoC

Discussion: https://bsky.app/profile/projectwallace.com/post/3mbgz7624jk2k

[codecov-commenter]

Bundle Report

Changes will decrease total bundle size by 2.04kB (-0.73%) ⬇️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
analyzeCss-esm	30.58kB	-2.04kB (-6.26%) ⬇️

Affected Assets, Files, and Routes:

view changes for bundle: analyzeCss-esm

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
css-*.js	-2.04kB	30.58kB	-6.26%

Files in css-*.js:

• ./src/index.ts → Total Size: 28.85kB

• ./src/properties/property-utils.ts → Total Size: 417 bytes

• ./src/css-tree-node-types.ts → Total Size: 328 bytes