Removed help from NWB file attributes

[pickles-bread-and-butter]

No longer needed to include in the NWB file attributes. Confirmed with Ben Dichter this is not required anymore.

[codecov-io]

Codecov Report

Merging #1428 into rc/1.6.0 will increase coverage by 0.11%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           rc/1.6.0    #1428      +/-   ##
============================================
+ Coverage     34.59%   34.71%   +0.11%     
============================================
  Files           342      342              
  Lines         33243    33253      +10     
============================================
+ Hits          11501    11544      +43     
+ Misses        21742    21709      -33

Impacted Files	Coverage Δ
allensdk/internal/api/behavior_data_lims_api.py	52.84% <0%> (-1.55%)	⬇️
...ephys/stimulus_analysis/receptive_field_mapping.py	89.01% <0%> (-0.44%)	⬇️
...dk/brain_observatory/behavior/trials_processing.py	24.46% <0%> (-0.07%)	⬇️
allensdk/internal/api/behavior_ophys_api.py	28.93% <0%> (+0.21%)	⬆️
...dk/brain_observatory/ecephys/write_nwb/__main__.py	67.59% <0%> (+0.23%)	⬆️
...brain_observatory/ecephys/copy_utility/__main__.py	63.52% <0%> (+0.43%)	⬆️
allensdk/internal/brain_observatory/time_sync.py	24.84% <0%> (+24.84%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ba72143...f7b3b59. Read the comment docs.