remove cereal install

Author: eseiler

cmake/cpack_install.cmake.in

@@ -5,7 +5,6 @@
 # Only if creating the source package (`make package_source`):
 # Copy dependency include directories into package's staging folder
 if (CPACK_SOURCE_INSTALLED_DIRECTORIES)
-    file (COPY "@SEQAN3_CEREAL_INCLUDE_DIR@/" DESTINATION "${CMAKE_CURRENT_BINARY_DIR}/include/seqan3/vendor")
     configure_file ("@CPM_DOWNLOAD_LOCATION@" "${CMAKE_CURRENT_BINARY_DIR}/cmake/CPM.cmake" COPYONLY)
     if ("@use_ccache_ADDED@" STREQUAL "YES")
         configure_file ("@use_ccache_SOURCE_DIR@/ccache/CMakeLists.txt"

cmake/seqan3-install.cmake

@@ -20,5 +20,3 @@ install (FILES "${SEQAN3_CLONE_DIR}/cmake/seqan3-config.cmake" "${SEQAN3_CLONE_D
 
 # install seqan3 header files in /include/seqan3
 install (DIRECTORY "${SEQAN3_INCLUDE_DIR}/seqan3" TYPE INCLUDE)
-
-install (DIRECTORY "${SEQAN3_CEREAL_INCLUDE_DIR}/cereal" DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/seqan3/vendor")