Remove references to nrrd files (#202)

docs/source/documentation/brainglobe-utils/image_io.md

@@ -1,7 +1,7 @@
 # Image IO submodule
 
 The image IO submodule provides various options to load and save image data. 
-It supports common formats like `tiff`, `nrrd` and `nifti`.
+It supports common formats like `tiff` and `nifti`.
 
 ## Installation
 
@@ -29,9 +29,6 @@ load.load_img_stack('mydata.tif', x_scaling_factor=1, y_scaling_factor=1, z_scal
 # directory containing a sequence of 2D tiffs
 load.load_from_folder('/path/to/dir')
 
-# nrrd
-load.load_nrrd('mydata.nrrd')
-
 # nifti
 load.load_nii('mydata.nii')
 ```
@@ -65,9 +62,6 @@ save.to_tiff(my_array, 'mydata.tif')
 # directory containing a sequence of 2D tiffs
 save.to_tiffs(my_array, '/path/to/dir/prefix')
 
-# nrrd
-save.to_nrrd(my_array, 'mydata.nrrd')
-
 # nifti
 save.to_nii(my_array, 'mydata.nii')
 ```

docs/source/documentation/brainrender/usage/using-your-data/index.md

@@ -40,8 +40,8 @@ and process neuron morphology data.
 
 Given the popularity of python for scientific research, there are tools to load almost all data formats. These include 
 numpy to load `.npy` files,  `tiffiles` for `.tiff` etc. BrainGlobe provides a general purpose software tool for 
-loading and saving image data ([image_io](/documentation/brainglobe-utils/image_io)). You can use `image_io` to load most types of 
-data (e.g.  `.nrrd`, `.tiff`, `.nifti` etc), e.g.:
+loading and saving image data ([image_io](/documentation/brainglobe-utils/image_io)). You can use `image_io` to load many types of 
+data (e.g. `.tiff`, `.nifti` etc), e.g.:
 
 ```python
 from brainglobe_utils.image_io import load