get rid of bad demo file

data/demos/oneBitBot.json

-{"lattice":{"units":"inches","cells":[[[{"indices":{"x":-2,"y":-2,"z":-1}},null],[{"indices":{"x":-2,"y":-1,"z":-1}},null],[{"indices":{"x":-2,"y":0,"z":-1}},null]],[[{"indices":{"x":-1,"y":-2,"z":-1}},null],[{"indices":{"x":-1,"y":-1,"z":-1}},{"indices":{"x":-1,"y":-1,"z":0}}],[{"indices":{"x":-1,"y":0,"z":-1}},{"indices":{"x":-1,"y":0,"z":0}}]],[[{"indices":{"x":0,"y":-2,"z":-1}},null],[{"indices":{"x":0,"y":-1,"z":-1}},{"indices":{"x":0,"y":-1,"z":0}}],[{"indices":{"x":0,"y":0,"z":-1}},{"indices":{"x":0,"y":0,"z":0}}]]],"cellsMin":{"x":-2,"y":-2,"z":-1},"cellsMax":{"x":0,"y":0,"z":0},"numCells":13,"scale":2.78388,"cellSeparation":{"xy":0,"z":0},"cellType":"octa","connectionType":"edgeRot","partType":"vox"},"assembler":{"camStrategy":"raster","placementOrder":"XYZ","camProcess":"gcode","machineName":"oneBitBot","dataOut":"","needsPostProcessing":false,"editsMadeToProgram":false,"rapidHeight":5.56776,"rapidHeightRelative":true,"safeHeight":0.5,"originPosition":{"x":1.3919,"y":1.3919,"z":0},"stockPosition":{"x":4.482,"y":1.3919,"z":3.1736},"stockPositionRelative":true,"stockFixed":true,"multipleStockPositions":false,"stockArraySize":{"x":4,"y":4},"stockSeparation":2.78388,"rapidSpeeds":{"xy":3,"z":2},"feedRate":{"xy":0.1,"z":0.1}}}
\ No newline at end of file

index.html

@@ -42,7 +42,7 @@
                 <li class="dropdown-submenu">
                 <a tabindex="-1">Demo Files<span class="pull-right fui-arrow-right"></span></a>
                 <ul class="dropdown-menu">
-                    <li><a data-file="demos/oneBitBot.json" class="jsonFile" href="#">One Bit Assembly</a></li>
+                    <li><a href="#">n/a</a></li>
                 </ul></li>
                 <li class="divider"></li>
                 <li class="dropdown-submenu">