BF: Remove LD_LIBRARY_PATH as breaking script on cluster

The modification of LD_LIBRARY_PATH https://git.fmrib.ox.ac.uk/fsl/fdt/-/blob/2202.3/CUDA/bedpostx_gpu#L7 is breaking the cp ( e.g. https://git.fmrib.ox.ac.uk/fsl/fdt/-/blob/2202.3/CUDA/bedpostx_gpu#L235 ) command on the cluster with error message:

cp: relocation error: /lib64/libacl.so.1: symbol getxattr, version ATTR_1.0 not defined in file libattr.so.1 with link time reference

Removing this line allows bedpostx_gpu to run to completion