COMPMID-864 Window::collapse_if_possible() is misused in several CL kernels

Removed unnecessary collapse_if_possible() calls.

Change-Id: I6f3434bc4a26470c4de5bac4e3d90b4b019c2c9c
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/117993
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/src/core/NEON/kernels/NEQuantizationLayerKernel.cpp b/src/core/NEON/kernels/NEQuantizationLayerKernel.cpp
index bff79f0..767af08 100644
--- a/src/core/NEON/kernels/NEQuantizationLayerKernel.cpp
+++ b/src/core/NEON/kernels/NEQuantizationLayerKernel.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017 ARM Limited.
+ * Copyright (c) 2017-2018 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -77,13 +77,11 @@
     ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INEKernel::window(), window);
 
     Window window_input_output(window);
-    window_input_output.collapse_if_possible(INEKernel::window(), 3);
     window_input_output.set(3, Window::Dimension(0, 1, 1));
 
     Window window_min_max;
     window_min_max.use_tensor_dimensions(_min_max->info()->tensor_shape());
     window_min_max.set(Window::DimX, Window::Dimension(0, 1, 1));
-    window_min_max.collapse_if_possible(INEKernel::window(), 1);
 
     Iterator input(_input, window_input_output);
     Iterator output(_output, window_input_output);