remove stray console.log

lib/less/source-map-builder.js

@@ -45,7 +45,6 @@ module.exports = function (SourceMapOutput, environment) {
         return this.sourceMap;
     };
     SourceMapBuilder.prototype.setExternalSourceMap = function(sourceMap) {
-        console.log(sourceMap);
         this.sourceMap = sourceMap;
     };