Do not prepopulate the user field, it's usually wrong

Especially without LDAP, or in cases where the login
is an email address. If we ever want this again,
we need to make this cleverer.

src/mirall/owncloudwizard.cpp

@@ -198,8 +198,6 @@ bool OwncloudSetupPage::isComplete() const
 
 void OwncloudSetupPage::initializePage()
 {
-    QString user = QString::fromLocal8Bit(qgetenv( "USER" ));
-    _ui.leUsername->setText( user );
 }
 
 int OwncloudSetupPage::nextId() const
@@ -301,8 +299,6 @@ bool OwncloudCredentialsPage::isComplete() const
 
 void OwncloudCredentialsPage::initializePage()
 {
-    QString user = QString::fromLocal8Bit(qgetenv( "USER" ));
-    _ui.OCUserEdit->setText( user );
 }
 
 int OwncloudCredentialsPage::nextId() const