Fix defer not not-working at top level (#10191)

tests/async/tasyncfilewrite.nim

@@ -9,7 +9,6 @@ import os, asyncfile, asyncdispatch
 const F = "test_async.txt"
 
 removeFile(F)
-defer: removeFile(F)
 let f = openAsync(F, fmWrite)
 var futs = newSeq[Future[void]]()
 for i in 1..3:
@@ -17,4 +16,4 @@ for i in 1..3:
 waitFor(all(futs))
 f.close()
 echo readFile(F)
-
+removeFile(F)

tests/exception/tdefer1.nim

@@ -1,6 +1,5 @@
 discard """
   output: '''hi
-hi
 1
 hi
 2
@@ -10,13 +9,6 @@ A'''
 
 # bug #1742
 
-template test(): untyped =
-    let a = 0
-    defer: echo "hi"
-    a
-
-let i = test()
-
 import strutils
 let x = try: parseInt("133a")
         except: -1
@@ -31,7 +23,7 @@ template atFuncEnd =
 
 template testB(): untyped =
     let a = 0
-    defer: echo "hi" # Delete this line to make it work
+    defer: echo "hi"
     a
 
 proc main =