Merge #1831

1831: Remove "Batches" from one hot section header in docs r=darsnack a=darsnack

Closes #510.

### PR Checklist

- [x] ~~Tests are added~~
- [x] ~~Entry in NEWS.md~~
- [x] Documentation, if applicable
- [x] ~~API changes require approval from a committer (different from the author, if applicable)~~


Co-authored-by: Kyle Daruwalla <daruwalla@wisc.edu>

Author: bors[bot]

docs/src/data/onehot.md

@@ -31,14 +31,7 @@ julia> onecold([0.3, 0.2, 0.5], [:a, :b, :c])
 :c
 ```
 
-```@docs
-Flux.onehot
-Flux.onecold
-```
-
-## Batches
-
-`onehotbatch` creates a batch (matrix) of one-hot vectors, and `onecold` treats matrices as batches.
+For multiple samples at once, `onehotbatch` creates a batch (matrix) of one-hot vectors, and `onecold` treats matrices as batches.
 
 ```jldoctest onehot
 julia> using Flux: onehotbatch
@@ -59,5 +52,7 @@ julia> onecold(ans, [:a, :b, :c])
 Note that these operations returned `OneHotVector` and `OneHotMatrix` rather than `Array`s. `OneHotVector`s behave like normal vectors but avoid any unnecessary cost compared to using an integer index directly. For example, multiplying a matrix with a one-hot vector simply slices out the relevant row of the matrix under the hood.
 
 ```@docs
+Flux.onehot
+Flux.onecold
 Flux.onehotbatch
 ```