rpm BUGFIX remove invalid test check

It resulted in

    + ctest --output-on-failure
    No tests were found!!!

Probably a leftover from v1.
diff --git a/distro/pkg/rpm/libyang.spec b/distro/pkg/rpm/libyang.spec
index 95e0ec3..f61b3a1 100644
--- a/distro/pkg/rpm/libyang.spec
+++ b/distro/pkg/rpm/libyang.spec
@@ -46,10 +46,6 @@
     ..
 make
 
-%check
-cd build
-ctest --output-on-failure
-
 %install
 cd build
 make DESTDIR=%{buildroot} install