Do not add parameter in shebang string.

On Linux "#!/usr/bin/env node --harmony_collections" is unfortunately
not recognized by system.

script/bootstrap

@@ -1,4 +1,4 @@
-#!/usr/bin/env node --harmony_collections
+#!/usr/bin/env node
 
 var nodeMinorVersion = process.versions.node.split('.')[1]
 if (nodeMinorVersion !== '10') {

script/build

@@ -1,4 +1,4 @@
-#!/usr/bin/env node --harmony_collections
+#!/usr/bin/env node
 var cp = require('./utils/child-process-wrapper.js');
 var path = require('path');
 

script/cibuild

@@ -1,4 +1,4 @@
-#!/usr/bin/env node --harmony_collections
+#!/usr/bin/env node
 var cp = require('./utils/child-process-wrapper.js');
 var fs = require('fs');
 var path = require('path');

script/clean

@@ -1,4 +1,4 @@
-#!/usr/bin/env node --harmony_collections
+#!/usr/bin/env node
 var cp = require('./utils/child-process-wrapper.js');
 var path = require('path');
 var os = require('os');

script/grunt

@@ -1,4 +1,4 @@
-#!/usr/bin/env node --harmony_collections
+#!/usr/bin/env node
 var cp = require('./utils/child-process-wrapper.js');
 var path = require('path');
 

script/test

@@ -1,4 +1,4 @@
-#!/usr/bin/env node --harmony_collections
+#!/usr/bin/env node
 var safeExec = require('./utils/child-process-wrapper.js').safeExec;
 var path = require('path');