grammar: remove shim again

Signed-off-by: Michael Hoffmann <mhoffm@posteo.de>

test/corpus/comments.txt

@@ -33,7 +33,6 @@ block {
     (block
       (identifier)
       (block_start)
-      (body)
       (comment)
       (block_end))))
 
@@ -55,8 +54,8 @@ block {
     (block
       (identifier)
       (block_start)
+      (comment)
       (body
-        (comment)
         (attribute
           (identifier)
           (expression
@@ -80,8 +79,8 @@ block {
     (block
       (identifier)
       (block_start)
+      (comment)
       (body
-        (comment)
         (attribute
           (identifier)
           (expression
@@ -153,5 +152,4 @@ comment at end of file
 --------------------------------------------------------------------------------
 
 (config_file
-  (body)
   (comment))

test/corpus/json.txt

@@ -0,0 +1,27 @@
+================================================================================
+top level object
+================================================================================
+
+{
+  "foo": "bar"
+}
+
+--------------------------------------------------------------------------------
+
+(config_file
+  (object
+    (object_start)
+    (object_elem
+      (expression
+        (literal_value
+          (string_lit
+            (quoted_template_start)
+            (template_literal)
+            (quoted_template_end))))
+      (expression
+        (literal_value
+          (string_lit
+            (quoted_template_start)
+            (template_literal)
+            (quoted_template_end)))))
+    (object_end)))