Fix line comments syntax

Don't write parsers after midnight kids.

For the explanation: I mixed up the syntax bits between Blueprint and
textual protocol buffers...

src/node-types.json

@@ -172,11 +172,6 @@
     "named": true,
     "fields": {}
   },
-  {
-    "type": "comment",
-    "named": true,
-    "fields": {}
-  },
   {
     "type": "default_case",
     "named": true,
@@ -259,6 +254,11 @@
       ]
     }
   },
+  {
+    "type": "line_comment",
+    "named": true,
+    "fields": {}
+  },
   {
     "type": "list_expression",
     "named": true,
@@ -632,10 +632,6 @@
     "type": "\"",
     "named": false
   },
-  {
-    "type": "#",
-    "named": false
-  },
   {
     "type": "(",
     "named": false
@@ -652,6 +648,10 @@
     "type": "-",
     "named": false
   },
+  {
+    "type": "//",
+    "named": false
+  },
   {
     "type": ":",
     "named": false