fix(gulp): don't warn about gulp hooks in v1 projects

Author: tlancina

lib/cli.js

@@ -126,7 +126,6 @@ Cli.run = function run(processArgv) {
     var taskModule = Cli.lookupTask(taskSetting.module);
     var taskInstance = new taskModule();
 
-    var config;
     if (isIonicV2) {
       // probably a better way to do this, but to avoid changing run() for every
       // task for now
@@ -161,7 +160,7 @@ Cli.run = function run(processArgv) {
           return Q.fcall(taskInstance.run.bind(taskInstance), Cli, argv);
         },
         function(e){ //task error, let gulp handle it
-          if (/serve|build|run|emulate|upload/.test(cmdName)) {
+          if (/serve|build|run|emulate|upload/.test(cmdName) && argv.v2) {
             var taskName = (cmdName === 'serve') ? 'watch' : 'build';
             console.warn('WARN: No \'' + beforeHook + '\' gulp task found!');
             if (oldConfig && gulp.tasks[taskName]) {