Utils: Remove QtcProcess::{is,set}Synchronous

This reverts a bit of fe8fbf1a4a which was over-shooting API-wise.

Change-Id: Iac4c2b9fa550f7ec0b0aa8deea8c3fc6b6ddcfba
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/utils/qtcprocess.cpp

@@ -104,7 +104,6 @@ public:
     bool m_lowPriority = false;
     bool m_disableUnixTerminal = false;
 
-    bool m_synchronous = false;
     QProcess::OpenMode m_openMode = QProcess::ReadWrite;
 
     // SynchronousProcess left overs:
@@ -263,9 +262,6 @@ void QtcProcess::start()
         }
         QProcess::start(command, arguments.toUnixArgs(), d->m_openMode);
     }
-
-    if (d->m_synchronous)
-        QProcess::waitForFinished();
 }
 
 #ifdef Q_OS_WIN
@@ -349,16 +345,6 @@ void QtcProcessPrivate::setupChildProcess_impl()
 #endif
 }
 
-bool QtcProcess::isSynchronous() const
-{
-    return d->m_synchronous;
-}
-
-void QtcProcess::setSynchronous(bool on)
-{
-    d->m_synchronous = on;
-}
-
 void QtcProcess::setOpenMode(OpenMode mode)
 {
     d->m_openMode = mode;