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/FuseBatchNormalizationFixture.h b/tests/validation/fixtures/FuseBatchNormalizationFixture.h
index 6fbabee..a05e416 100644
--- a/tests/validation/fixtures/FuseBatchNormalizationFixture.h
+++ b/tests/validation/fixtures/FuseBatchNormalizationFixture.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2021 Arm Limited.
+ * Copyright (c) 2019-2021, 2023 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -47,7 +47,6 @@
 class FuseBatchNormalizationFixture : public framework::Fixture
 {
 public:
-    template <typename...>
     void setup(TensorShape shape_w, DataType data_type, DataLayout data_layout, bool in_place, bool with_bias, bool with_gamma, bool with_beta)
     {
         std::tie(_target_w, _target_b)       = compute_target(shape_w, data_type, data_layout, in_place, with_bias, with_gamma, with_beta);