refactor: remove deprecated scopeId codegen

BREAKING CHANGE: Output of SFC using `<style scoped>` generated by 3.2+
will be incompatible w/ runtime <3.2.

packages/compiler-core/src/codegen.ts

@@ -234,14 +234,7 @@ export function generate(
       ? args.map(arg => `${arg}: any`).join(',')
       : args.join(', ')
 
-  if (genScopeId && !isSetupInlined) {
-    // root-level _withId wrapping is no longer necessary after 3.0.8 and is
-    // a noop, it's only kept so that code compiled with 3.0.8+ can run with
-    // runtime < 3.0.8.
-    // TODO: consider removing in 3.1
-    push(`const ${functionName} = ${PURE_ANNOTATION}${WITH_ID}(`)
-  }
-  if (isSetupInlined || genScopeId) {
+  if (isSetupInlined) {
     push(`(${signature}) => {`)
   } else {
     push(`function ${functionName}(${signature}) {`)
@@ -390,14 +383,7 @@ function genModulePreamble(
   genScopeId: boolean,
   inline?: boolean
 ) {
-  const {
-    push,
-    newline,
-    optimizeImports,
-    runtimeModuleName,
-    scopeId,
-    helper
-  } = context
+  const { push, newline, optimizeImports, runtimeModuleName } = context
 
   if (genScopeId) {
     ast.helpers.push(WITH_SCOPE_ID)
@@ -446,18 +432,6 @@ function genModulePreamble(
     newline()
   }
 
-  // we technically don't need this anymore since `withCtx` already sets the
-  // correct scopeId, but this is necessary for backwards compat
-  // TODO: consider removing in 3.1
-  if (genScopeId) {
-    push(
-      `const ${WITH_ID} = ${PURE_ANNOTATION}${helper(
-        WITH_SCOPE_ID
-      )}("${scopeId}")`
-    )
-    newline()
-  }
-
   genHoists(ast.hoists, context)
   newline()