Make test fixture setup methods not be templated

This simplifies code slightly as nothing needs those functions to
be function templates.

Signed-off-by: Matthew Bentham <Matthew.Bentham@arm.com>
Change-Id: If48694bf5677bb83426aeba952eb87174a42dff0
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/c/VisualCompute/ComputeLibrary/+/536135
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Jakub Sujak <jakub.sujak@arm.com>
Comments-Addressed: bsgcomp <bsgcomp@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/9907
Benchmark: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/tests/validation/fixtures/SplitFixture.h b/tests/validation/fixtures/SplitFixture.h
index 3006f21..2039253 100644
--- a/tests/validation/fixtures/SplitFixture.h
+++ b/tests/validation/fixtures/SplitFixture.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2021 Arm Limited.
+ * Copyright (c) 2018-2021, 2023 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -47,7 +47,6 @@
 class SplitFixture : public framework::Fixture
 {
 public:
-    template <typename...>
     void setup(TensorShape shape, unsigned int axis, unsigned int splits, DataType data_type)
     {
         _target    = compute_target(shape, axis, splits, data_type);
@@ -149,7 +148,6 @@
 class SplitShapesFixture : public framework::Fixture
 {
 public:
-    template <typename...>
     void setup(TensorShape shape, unsigned int axis, std::vector<TensorShape> split_shapes, DataType data_type)
     {
         _target    = compute_target(shape, axis, split_shapes, data_type);