Remove setting of ESMF_SL_PRELOAD_LIBLINKER for Darwin openmpi

This breaks the build on my Mac because it uses a Fortran linker when it
should be using a C++ linker: the flags are set up for a C++ linker, and
using a Fortran linker means that we're not picking up the necessary C++
libraries (at least, I think that's the issue).

Author: billsacks

build/common.mk

@@ -2053,10 +2053,6 @@ ESMF_SL_PRELOAD_LIBLINKER = $(ESMF_CXXCOMPILER)
 ifeq ($(ESMF_OS),Darwin)
 ESMF_ENV_PRELOAD          = DYLD_INSERT_LIBRARIES
 ESMF_ENV_PRELOAD_DELIMIT  = ':'
-ifeq ($(ESMF_COMM),openmpi)
-# make sure to link in the Fortran MPI bindings
-ESMF_SL_PRELOAD_LIBLINKER = $(ESMF_F90COMPILER)
-endif
 else
 ESMF_ENV_PRELOAD          = LD_PRELOAD
 ESMF_ENV_PRELOAD_DELIMIT  = ' '