Remove obsolete file.

doc/samples/meshviewer/meshviewer.nacl.nmf

@@ -1,6 +0,0 @@
-{
-  "program": {
-    "x86-32": {"url": "meshviewer.32.nexe"},
-    "x86-64": {"url": "meshviewer.64.nexe"}
-  }
-}