Fix the shared library build with CMake

Fix an error in the earlier merge.
diff --git a/library/CMakeLists.txt b/library/CMakeLists.txt
index a448442..14dfa22 100644
--- a/library/CMakeLists.txt
+++ b/library/CMakeLists.txt
@@ -204,14 +204,6 @@
     target_include_directories(mbedtls
         PUBLIC ${MBEDTLS_DIR}/include/)
 
-    add_library(mbedx509 SHARED ${src_x509})
-    set_target_properties(mbedx509 PROPERTIES VERSION 2.16.0 SOVERSION 0)
-    target_link_libraries(mbedx509 ${libs} mbedcrypto)
-
-    add_library(mbedtls SHARED ${src_tls})
-    set_target_properties(mbedtls PROPERTIES VERSION 2.16.0 SOVERSION 12)
-    target_link_libraries(mbedtls ${libs} mbedx509)
-
     install(TARGETS mbedtls mbedx509 mbedcrypto
             DESTINATION ${LIB_INSTALL_DIR}
             PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)