Remove shared variant until we have libcxxabi built

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

libcxx.spec

@@ -120,18 +120,6 @@ mv tmp.a libc++.a
 ranlib libc++.a
 popd
 
-%cmake  -GNinja \
-	$common_cmake_flags \
-	-DLIBCXX_STANDALONE_BUILD=ON \
-%if %{bootstrap} < 1
-	-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=ON \
-%endif
-	-DLIBCXX_ENABLE_STATIC=OFF \
-	-DLIBCXX_ENABLE_SHARED=ON \
-	-DLIBCXX_ENABLE_STATIC_ABI_LIBRARY=OFF
-
-%cmake_build
-
 %install
 
 %cmake_install
@@ -146,12 +134,10 @@ install -m 0644 src/include/*.h %{buildroot}%{_includedir}/libcxx-internal/
 %files
 %license LICENSE.TXT
 %doc CREDITS.TXT TODO.TXT
-%{_libdir}/libc++.so.*
 
 %files devel
 %{_includedir}/libcxx-internal/
 %{_includedir}/c++/
-%{_libdir}/libc++.so
 
 %files static
 %license LICENSE.TXT