diff --git a/src/Radials.jl b/src/Radials.jl
index 137beca9..1139d80a 100644
--- a/src/Radials.jl
+++ b/src/Radials.jl
@@ -2,8 +2,6 @@ using LinearAlgebra
 using ExtendableSparse
 using Base.Threads
 
-abstract type AbstractSurrogate end
-
 _copy(t::Tuple) = t
 _copy(t) = copy(t)