remove allocate import

Author: vchuravy

src/Trixi.jl

@@ -60,8 +60,7 @@ using DiffEqCallbacks: PeriodicCallback, PeriodicCallbackAffect
 using FillArrays: Ones, Zeros
 using ForwardDiff: ForwardDiff
 using HDF5: HDF5, h5open, attributes, create_dataset, datatype, dataspace
-using KernelAbstractions: KernelAbstractions, @index, @kernel, get_backend, Backend,
-                          allocate
+using KernelAbstractions: KernelAbstractions, @index, @kernel, get_backend, Backend
 using AcceleratedKernels: AcceleratedKernels
 using LinearMaps: LinearMap
 if _PREFERENCE_LOOPVECTORIZATION