Revert "ssa: defer load/store func and args"

cl/_testgo/defer6/in.go

@@ -1,15 +0,0 @@
-package main
-
-func main() {
-	var a int = 5
-	defer println(a)
-	defer func() {
-		println(a)
-	}()
-	a = 10
-	panic("error")
-	//Output:
-	// 10
-	// 5
-	// panic: error
-}

cl/_testgo/defer6/out.ll

@@ -1 +0,0 @@
-;