QtcProcess: Get rid of useTerminal

Remove SshRemoteProcessRunner::runInTerminal() method,
it wasn't used anywhere (just in test).
Remove QtcProcess::useTerminal, as process should be
created in TerminalOn mode when there is a need for terminal.
Add a parameter to
SshRemoteProcess::fullLocalCommandLine(bool inTerminal)
as this may still be needed when running application
through ssh from terminal (ssh -tt option).

Change-Id: I71911082fcca190b82a1106a2ca1ca48dc5d4c79
Reviewed-by: hjk <hjk@qt.io>
(cherry picked from commit 95a9b22f6f)

src/libs/ssh/sshremoteprocessrunner.h

@@ -40,7 +40,6 @@ public:
     ~SshRemoteProcessRunner();
 
     void run(const QString &command, const SshConnectionParameters &sshParams);
-    void runInTerminal(const QString &command, const SshConnectionParameters &sshParams);
     QString command() const;
 
     QString lastConnectionErrorString() const;