Avoid extra assignment for default export

tasks/generate-defines.js

@@ -1,31 +0,0 @@
-var fs = require('fs');
-var path = require('path');
-var esprima = require('esprima');
-
-var mainPath = path.join(__dirname, '..', 'src', 'ol', 'index.js');
-var mainSource = fs.readFileSync(mainPath, 'utf8');
-var definesPath = path.join(__dirname, '..', 'build', 'defines.json');
-
-function isDefineLikeStatement(statement) {
-  return statement.type === 'ExpressionStatement' &&
-      statement.expression && statement.expression.type === 'AssignmentExpression' &&
-      statement.expression.left.type === 'MemberExpression' &&
-      statement.expression.right.type === 'Literal' &&
-      statement.leadingComments;
-}
-
-var ast = esprima.parse(mainSource, {attachComment: true});
-var defines = {};
-ast.body.forEach(function(statement) {
-  if (isDefineLikeStatement(statement)) {
-    var comment = statement.leadingComments[statement.leadingComments.length - 1].value;
-    if (comment.indexOf('* @define {') >= 0) {
-      var expression = statement.expression;
-      var name = expression.left.object.name + '.' + expression.left.property.name;
-      var value = expression.right.value;
-      defines[name] = value;
-    }
-  }
-});
-
-fs.writeFileSync(definesPath, JSON.stringify(defines, null, 2));