Update usage.MD

docs/src/usage.MD

@@ -1,9 +1,6 @@
 # Usage
 Have a look at the [Examples](@ref) and see the [API reference](@ref) for details on the usage of `PerfTest`.
 
-!!! tip "Hint"
-    [ParallelStencil.jl] enables straightforward working with `CellArrays`. It automatically allocates `CellArray` when the keyword arguments `celldims` or `celltype` are given to the architecture-agnostic allocation macros `@zeros`, `@ones`, `@rand`, `@falses`, `@trues` and `@fill` (refer to the documentation of [ParallelStencil.jl] for more details).
-
 
 ## Installation
 `PerfTest` can be installed directly with the [Julia package manager] from the [Julia REPL]: