fix(compiler-ssr): avoid duplicated asset imports merged from component slot client branch

fix vitejs/vite#2034

packages/compiler-ssr/src/transforms/ssrTransformComponent.ts

@@ -289,14 +289,16 @@ function subTransform(
   childContext.identifiers = { ...parentContext.identifiers }
   // traverse
   traverseNode(childRoot, childContext)
-  // merge helpers/components/directives/imports into parent context
-  ;(['helpers', 'components', 'directives', 'imports'] as const).forEach(
-    key => {
-      childContext[key].forEach((value: any) => {
-        ;(parentContext[key] as any).add(value)
-      })
-    }
-  )
+  // merge helpers/components/directives into parent context
+  ;(['helpers', 'components', 'directives'] as const).forEach(key => {
+    childContext[key].forEach((value: any) => {
+      ;(parentContext[key] as any).add(value)
+    })
+  })
+  // imports/hoists are not merged because:
+  // - imports are only used for asset urls and should be consistent between
+  //   node/client branches
+  // - hoists are not enabled for the client branch here
 }
 
 function clone(v: any): any {