remove unused includes

libs/main/system/piprocess.cpp

@@ -17,9 +17,7 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include "piliterals_time.h"
 #include "pitime.h"
-#include "pitranslator.h"
 #ifndef MICRO_PIP
 
 #  include "piincludes_p.h"
@@ -294,11 +292,6 @@ void PIProcess::terminate() {
 }
 
 
-bool PIProcess::waitForFinish() {
-	return PIThread::waitForFinish(1_m);
-}
-
-
 void PIProcess::execIndependent(const PIString & program, const PIStringList & args_) {
 	PIProcess p;
 	p.args << program << args_;