Remove support for NEIm2Col, NECol2Im, NEGEMMInterleave4x4, NEGEMMTranspose1xW

Remove functions that are rarely used standalone.
Moreover, similar OpenCL functions are not exposed, thus there is no
parity in place.

Partially Resolves: COMPMID-3996

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: Idd124c27c37dae9cbcfec1b6453d451cc9d4ef53
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4649
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/tests/validation/NEON/Col2Im.cpp b/tests/validation/NEON/Col2Im.cpp
index 5f98b45..9139f0c 100644
--- a/tests/validation/NEON/Col2Im.cpp
+++ b/tests/validation/NEON/Col2Im.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 Arm Limited.
+ * Copyright (c) 2017-2020 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -22,7 +22,8 @@
  * SOFTWARE.
  */
 #include "arm_compute/core/Types.h"
-#include "arm_compute/runtime/NEON/functions/NECol2Im.h"
+#include "src/core/NEON/kernels/NECol2ImKernel.h"
+#include "tests/NEON/Helper.h"
 #include "tests/datasets/ShapeDatasets.h"
 #include "tests/framework/Asserts.h"
 #include "tests/framework/Macros.h"
@@ -38,6 +39,8 @@
 TEST_SUITE(NEON)
 TEST_SUITE(Col2Im)
 
+using NECol2Im = NESynthetizeFunction<NECol2ImKernel>;
+
 // *INDENT-OFF*
 // clang-format off
 DATA_TEST_CASE(Validate, framework::DatasetMode::ALL, zip(zip(zip(zip(