Update README.md

Got rid of duplicate variable

README.md

@@ -37,7 +37,6 @@ var pg = require('pg');
 var copyFrom = require('pg-copy-streams').from;
 
 pg.connect(function(err, client, done) {
-  var text = 'COPY my_table FROM STDIN';
   var stream = client.query(copyFrom('COPY my_table FROM STDIN'));
   var fileStream = fs.createReadStream('some_file.tdv')
   fileStream.pipe(stream);