Remove ApplicationLauncher::Mode

The actual remaining use was to pop up a terminal in some
setups where Mode == Console, with a default of Gui meaning
"no console". In some downstream uses it was used set to
Console (probably to mean "this helper process does not need
a gui") but then luckily ignored when actually starting the
helper processes.

All cases where the console is useful and requested are
nowadays RunWorkers belonging to RunConfigurations with
a TerminalAspect, so they can directly get the relevant bit
from their RunConfiguration without having it part of
all StandardRunnables.

Change-Id: I1368d5968da5cf672656aebf200ccac8d45335d0
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/autotest/testrunconfiguration.h

@@ -67,7 +67,6 @@ public:
         r.commandLineArguments = m_testConfig->argumentsForTestRunner().join(' ');
         r.workingDirectory = m_testConfig->workingDirectory();
         r.environment = m_testConfig->environment();
-        r.runMode = ProjectExplorer::ApplicationLauncher::Gui;
         r.device = ProjectExplorer::DeviceManager::instance()->defaultDevice(
                     ProjectExplorer::Constants::DESKTOP_DEVICE_TYPE);
         return r;