Revert IDBFS, NODEFS and syncfs modifications

Author: jeromewu

javascript/post.js

@@ -1,3 +1,4 @@
+/*
 Module['syncfs'] = function(populate) {
   return new Promise(function(resolve, reject) {
     FS.syncfs(populate, function(err) {
@@ -9,3 +10,4 @@ Module['syncfs'] = function(populate) {
     });
   });
 }
+*/

javascript/prepend.js

@@ -3,6 +3,7 @@ var logger = function(){}
 Module['setLogger'] = function(_logger) { logger = _logger; };
 Module['print'] = function(message) { logger(message, 'stdout'); };
 Module['printErr'] = function(message) { logger(message, 'stderr'); };
+/*
 Module['preRun'] = [
   function() {
     FS.mkdir('/data');
@@ -17,3 +18,4 @@ Module['preRun'] = [
     }
   },
 ];
+*/