Revert "[cmake] [compiler-rt] Call llvm_setup_rpath() when adding shared libraries."

This reverts commit 78fd93e as
a follow up to D91099.

Author: petrhosek

compiler-rt/cmake/Modules/AddCompilerRT.cmake

@@ -359,9 +359,6 @@ function(add_compiler_rt_runtime name type)
       target_link_libraries(${libname} PRIVATE ${builtins_${libname}})
     endif()
     if(${type} STREQUAL "SHARED")
-      if(COMMAND llvm_setup_rpath)
-        llvm_setup_rpath(${libname})
-      endif()
       if(WIN32 AND NOT CYGWIN AND NOT MINGW)
         set_target_properties(${libname} PROPERTIES IMPORT_PREFIX "")
         set_target_properties(${libname} PROPERTIES IMPORT_SUFFIX ".lib")