Fixes issue with MFix reader and timesteps.

This is a fix to remove an errant additional scalar causing the timestep
information array to be misaligned with the variable name array.

Change-Id: I9697fb8d724959a3703cd29ef3d2a41b50e67d14
Merge topic 'fix_mfix_reader' into master

f6c0f71c Fixes issue with MFix reader and timesteps.