Some simplifications, using UNO_QUERY_THROW

Change-Id: Iab702a5ad9697f1c71cc12c7dea954ca620cfdbe
Reviewed-on: https://gerrit.libreoffice.org/34260Tested-by: Stephan Bergmann <sbergman@redhat.com>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

sccomp/source/solver/CoinMPSolver.cxx

@@ -52,9 +52,7 @@ private:
 
 void SAL_CALL CoinMPSolver::solve()
 {
-    uno::Reference<frame::XModel> xModel( mxDoc, uno::UNO_QUERY );
-    if ( !xModel.is() )
-        throw uno::RuntimeException();
+    uno::Reference<frame::XModel> xModel( mxDoc, uno::UNO_QUERY_THROW );
 
     maStatus.clear();
     mbSuccess = false;

sccomp/source/solver/LpsolveSolver.cxx

@@ -83,9 +83,7 @@ private:
 
 void SAL_CALL LpsolveSolver::solve()
 {
-    uno::Reference<frame::XModel> xModel( mxDoc, uno::UNO_QUERY );
-    if ( !xModel.is() )
-        throw uno::RuntimeException();
+    uno::Reference<frame::XModel> xModel( mxDoc, uno::UNO_QUERY_THROW );
 
     maStatus.clear();
     mbSuccess = false;