Fix Doxygen references

Some references are no longer valid because the kernels/functions have
been removed.

Change-Id: Iccfaabb678a4b2709442e4eb827800e63ea47b05
Signed-off-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4764
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/runtime/CL/functions/CLBitwiseAnd.h b/arm_compute/runtime/CL/functions/CLBitwiseAnd.h
index bf5993f..a703242 100644
--- a/arm_compute/runtime/CL/functions/CLBitwiseAnd.h
+++ b/arm_compute/runtime/CL/functions/CLBitwiseAnd.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020 Arm Limited.
+ * Copyright (c) 2016-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -31,7 +31,7 @@
 class CLCompileContext;
 class ICLTensor;
 
-/** Basic function to run @ref CLBitwiseAndKernel.
+/** Basic function to perform bitwise AND by running @ref CLBitwiseKernel.
  *
  * @note The tensor data type for the inputs must be U8.
  * @note The function performs a bitwise AND operation using the two input tensors.
diff --git a/arm_compute/runtime/CL/functions/CLBitwiseNot.h b/arm_compute/runtime/CL/functions/CLBitwiseNot.h
index 1d8531a..6f65749 100644
--- a/arm_compute/runtime/CL/functions/CLBitwiseNot.h
+++ b/arm_compute/runtime/CL/functions/CLBitwiseNot.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020 Arm Limited.
+ * Copyright (c) 2016-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -31,7 +31,7 @@
 class CLCompileContext;
 class ICLTensor;
 
-/** Basic function to run @ref CLBitwiseNotKernel.
+/** Basic function to perform bitwise NOT by running @ref CLBitwiseKernel.
  *
  * @note The tensor data type for the inputs must be U8.
  * @note The function performs a bitwise NOT operation on input tensor.
diff --git a/arm_compute/runtime/CL/functions/CLBitwiseOr.h b/arm_compute/runtime/CL/functions/CLBitwiseOr.h
index 7876cbf..3c904fb 100644
--- a/arm_compute/runtime/CL/functions/CLBitwiseOr.h
+++ b/arm_compute/runtime/CL/functions/CLBitwiseOr.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020 Arm Limited.
+ * Copyright (c) 2016-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -31,7 +31,7 @@
 class CLCompileContext;
 class ICLTensor;
 
-/** Basic function to run @ref CLBitwiseOrKernel.
+/** Basic function to perform bitwise OR by running @ref CLBitwiseKernel.
  *
  * @note The tensor data type for the inputs must be U8.
  * @note The function performs a bitwise OR operation using the two input tensors.
diff --git a/arm_compute/runtime/CL/functions/CLBitwiseXor.h b/arm_compute/runtime/CL/functions/CLBitwiseXor.h
index 4f05406..a33a64a 100644
--- a/arm_compute/runtime/CL/functions/CLBitwiseXor.h
+++ b/arm_compute/runtime/CL/functions/CLBitwiseXor.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2020 Arm Limited.
+ * Copyright (c) 2016-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -31,7 +31,7 @@
 class CLCompileContext;
 class ICLTensor;
 
-/** Basic function to run @ref CLBitwiseXorKernel.
+/** Basic function to perform bitwise XOR by running @ref CLBitwiseKernel.
  *
  * @note The tensor data type for the inputs must be U8.
  * @note The function performs a bitwise XOR operation using the two input tensors.
diff --git a/arm_compute/runtime/CL/functions/CLFlattenLayer.h b/arm_compute/runtime/CL/functions/CLFlattenLayer.h
index ffe06aa..8dedd74 100644
--- a/arm_compute/runtime/CL/functions/CLFlattenLayer.h
+++ b/arm_compute/runtime/CL/functions/CLFlattenLayer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2020 Arm Limited.
+ * Copyright (c) 2017-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -36,7 +36,7 @@
 
 /** Basic function to execute flatten. This function calls the following OpenCL kernel:
 *
-* -# @ref CLFlattenLayerKernel
+* -# @ref CLReshapeLayer
 *
 */
 class CLFlattenLayer : public IFunction
diff --git a/arm_compute/runtime/CL/functions/CLGenerateProposalsLayer.h b/arm_compute/runtime/CL/functions/CLGenerateProposalsLayer.h
index 0fb9a06..cf5fd50 100644
--- a/arm_compute/runtime/CL/functions/CLGenerateProposalsLayer.h
+++ b/arm_compute/runtime/CL/functions/CLGenerateProposalsLayer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2020 Arm Limited.
+ * Copyright (c) 2019-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -50,7 +50,7 @@
 /** Basic function to generate proposals for a RPN (Region Proposal Network)
  *
  * This function calls the following OpenCL kernels:
- * -# @ref CLComputeAllAnchors
+ * -# @ref CLComputeAllAnchorsKernel
  * -# @ref CLPermute x 2
  * -# @ref CLReshapeLayer x 2
  * -# @ref CLBoundingBoxTransform