Allow void macro result (#11286)

* allow void macro result
* add test for void macro result type

tests/vm/texcl.nim

@@ -18,7 +18,7 @@ proc initOpts(): set[nlOptions] =
 
 const cOpts = initOpts()
 
-macro nlo(): typed =
+macro nlo() =
   nlOpts.incl(nloNone)
   nlOpts.excl(nloDebug)
   result = newEmptyNode()

tests/vm/tstaticprintseq.nim

@@ -24,7 +24,7 @@ bb
 
 const s = @[1,2,3]
 
-macro foo: typed =
+macro foo() =
   for e in s:
     echo e
 
@@ -55,7 +55,7 @@ static:
   var m2: TData = data
   for x in m2.numbers: echo x
 
-macro ff(d: static[TData]): typed =
+macro ff(d: static[TData]) =
   for x in d.letters:
     echo x
 

tests/vm/ttouintconv.nim

@@ -20,7 +20,7 @@ nimout: '''
 
 #bug #2514
 
-macro foo(): typed =
+macro foo() =
   var x = 8'u8
   var y = 9'u16
   var z = 17'u32
@@ -58,7 +58,7 @@ macro foo(): typed =
   var zz = 0x7FFFFFFF'u32
   echo zz
 
-macro foo2(): typed =
+macro foo2() =
   var xx = 0x7FFFFFFFFFFFFFFF
   echo xx