Do not create target `NetCDF_Fortran`

I do not see the point of the additional target `NetCDF_Fortran`: we
have the target `PkgConfig::NetCDF_Fortran` and we can just create an
alias `NetCDF_Fortran::NetCDF_Fortran` for
`PkgConfig::NetCDF_Fortran`.

cmake/FindNetCDF_Fortran.cmake

@@ -26,10 +26,4 @@ if(PKG_CONFIG_VERSION_STRING VERSION_LESS "0.29.2"
     "-- pkg_netcdf_fortran_includedir: ${pkg_netcdf_fortran_includedir}")
 endif()
 
-add_library(NetCDF_Fortran INTERFACE IMPORTED)
-
-set_target_properties(NetCDF_Fortran PROPERTIES
-  INTERFACE_LINK_LIBRARIES PkgConfig::NetCDF_Fortran)
-
-target_link_libraries(NetCDF_Fortran INTERFACE NetCDF::NetCDF)
-add_library(NetCDF_Fortran::NetCDF_Fortran ALIAS NetCDF_Fortran)
+add_library(NetCDF_Fortran::NetCDF_Fortran ALIAS PkgConfig::NetCDF_Fortran)