Revert "IVGCVSW-7850 block non const bias on NEON Depthwise conv."

This reverts commit 47016c0c74fc97cf51f90555a11238332fe9406c.

Signed-off-by: Colm Donelan <colm.donelan@arm.com>
Change-Id: I40856ccb581bf60c8a72ecac4cfe7375cbf4b286
diff --git a/src/backends/neon/workloads/NeonDepthwiseConvolutionWorkload.cpp b/src/backends/neon/workloads/NeonDepthwiseConvolutionWorkload.cpp
index 53f7ee3..b9e9ebb 100644
--- a/src/backends/neon/workloads/NeonDepthwiseConvolutionWorkload.cpp
+++ b/src/backends/neon/workloads/NeonDepthwiseConvolutionWorkload.cpp
@@ -62,12 +62,6 @@
             return arm_compute::Status{arm_compute::ErrorCode::RUNTIME_ERROR,
                                        "ArmNN NeonDepthwiseConvolutionWorkload has empty bias value."};
         }
-        // There's currently a problem with non const bias, so we'll explicitly block it here.
-        if (!biases.value().IsConstant())
-        {
-            return arm_compute::Status{arm_compute::ErrorCode::RUNTIME_ERROR,
-                                        "ArmNN NeonDepthwiseConvolutionWorkload does not support non constant bias."};
-        }
         aclBiasesInfo = BuildArmComputeTensorInfo(biases.value(), descriptor.m_DataLayout);
         aclBiasesInfo.set_are_values_constant(biases.value().IsConstant());
         optionalAclBiasesInfo = &aclBiasesInfo;
@@ -104,8 +98,6 @@
     {
         biasesPtr = &PolymorphicDowncast<IAclTensorHandle *>(m_Data.m_Inputs[2])->GetTensor();
         biasesPtr->info()->set_are_values_constant(info.m_InputTensorInfos[2].IsConstant());
-        // We assume here that NeonDepthwiseConvolutionWorkloadValidate has been called before the constructor.
-        ARMNN_ASSERT(info.m_InputTensorInfos[2].IsConstant() == true);
     }
 
     arm_compute::TensorShape weightsShape = weights.info()->tensor_shape();