Fixing PEA_P1_M.f45_g37_rx1.A.edison_intel

This removes the flag that was causing this test to fail, because
the flag is not compatible with the default -static flag.

[BFB]
Fixes #394

machines-acme/config_compilers.xml

@@ -304,7 +304,6 @@ for mct, etc.
   <SUPPORTS_CXX>TRUE</SUPPORTS_CXX>
   <HAS_F2008_CONTIGUOUS>TRUE</HAS_F2008_CONTIGUOUS>
 
-  <ADD_FFLAGS MPILIB="mpi-serial"> -mcmodel medium </ADD_FFLAGS>
   <ADD_FFLAGS OS="Linux"> -mcmodel medium -shared-intel </ADD_FFLAGS>
 
 </compiler>