Remove CMake code once Axom and BLT are updated

[ldowen]

The code CMake code for bringing in Axom should be unnecessary in future updates. Specifically:

spheral/cmake/InstallTPLs.cmake

Lines 85 to 89 in ab7c4bc

 foreach(_comp ${AXOM_COMPONENTS_ENABLED}) 
   list(APPEND SPHERAL_BLT_DEPENDS axom::${_comp}) 
   get_target_property(axom_deps axom::${_comp} INTERFACE_LINK_LIBRARIES) 
   list(APPEND SPHERAL_BLT_DEPENDS ${axom_deps}) 
 endforeach() 

and

spheral/cmake/InstallTPLs.cmake

Lines 112 to 131 in ab7c4bc

 set(_props) 
 if( ${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.13.0" ) 
   list(APPEND _props INTERFACE_LINK_OPTIONS) 
 endif() 
 list(APPEND _props INTERFACE_COMPILE_OPTIONS) 
 foreach(_target axom axom::openmp) 
   if(TARGET ${_target}) 
     message(STATUS "Removing OpenMP Flags from target[${_target}]") 
     foreach(_prop ${_props}) 
       get_target_property(_flags ${_target} ${_prop}) 
       if ( _flags ) 
 	string( REPLACE "${OpenMP_CXX_FLAGS}" "" 
 	  correct_flags "${_flags}" ) 
 	string( REPLACE "${OpenMP_Fortran_FLAGS}" "" 
 	  correct_flags "${correct_flags}" ) 
 	set_target_properties( ${_target} PROPERTIES ${_prop} "${correct_flags}" ) 
       endif() 
     endforeach() 
   endif() 
 endforeach()