Ionic remove back button text

Just add below lines in your app.js

$ionicConfigProvider.backButton.text('Back').icon('ion-chevron-left');
$ionicConfigProvider.backButton.previousTitleText(false).text(''); // Removes back button text 

It may be like as:

app.run(function($ionicPlatform, $rootScope, $ionicLoading) {
   // your code
})

.config([...]){
   $ionicConfigProvider.backButton.text('Back').icon('ion-chevron-left');
   $ionicConfigProvider.backButton.previousTitleText(false).text(''); // Removes back button text
}