drop separate nesting detection entirely

Author: RobinMalfait

src/lib/detectNesting.js

@@ -7,16 +7,13 @@ import resolveDefaultsAtRules from './lib/resolveDefaultsAtRules'
 import collapseAdjacentRules from './lib/collapseAdjacentRules'
 import collapseDuplicateDeclarations from './lib/collapseDuplicateDeclarations'
 import partitionApplyAtRules from './lib/partitionApplyAtRules'
-import detectNesting from './lib/detectNesting'
 import { createContext } from './lib/setupContextUtils'
 import { issueFlagNotices } from './featureFlags'
 
 export default function processTailwindFeatures(setupContext) {
   return async function (root, result) {
     let { tailwindDirectives, applyDirectives } = normalizeTailwindDirectives(root)
 
-    detectNesting()(root, result)
-
     // Partition apply rules that are found in the css
     // itself.
     partitionApplyAtRules()(root, result)