ENH: Remove EXTRA_FORTRAN_C_LIBS Fortran test hack

This hack was created to help the Fortran test executables link to the
implicit C libraries added by BullsEye.  Now that implicit libraries
from all languages are detected and included automatically the hack is
no longer needed.

Tests/Fortran/CMakeLists.txt

@@ -62,11 +62,6 @@ function(test_fortran_c_interface_module)
   message("Fortran = ${CMAKE_Fortran_COMPILER_ID}")
   message("C = ${CMAKE_C_COMPILER_ID}")
   add_executable(foo ${srcs})
-  if(NOT ("$ENV{EXTRA_FORTRAN_C_LIBS}" STREQUAL ""))
-    message(STATUS 
-      "linking in extra C to Fortran libs $ENV{EXTRA_FORTRAN_C_LIBS}")
-    target_link_libraries(foo $ENV{EXTRA_FORTRAN_C_LIBS})
-  endif()
   # print out some stuff to help debug on machines via cdash
   file(READ "${testf_BINARY_DIR}/foo.h" fooh)
   message("foo.h contents:\n${fooh}")