Add BCE loss function

src/loss/classification/BCE.cpp

@@ -99,7 +99,7 @@ Aidge::Tensor Aidge::loss::BCE(std::shared_ptr<Tensor>& prediction,
 	sub2_node->addChild(mul2_node, 0, 0);
 	ln2_node->addChild(mul2_node, 0, 1);
 	
-	// Define node: sub3 = - [(target + eps1) * ln(prediction + eps1) + (1 - target + eps2) * ln(1 - prediction + eps21)]
+	// Define node: sub3 = - [(target + eps1) * ln(prediction + eps1) + (1 - target + eps2) * ln(1 - prediction + eps2)]
 	const std::shared_ptr<Node> sub3_node = Sub("sub3");
 	mul2_node->addChild(sub3_node, 0, 0);
 	mul1_node->addChild(sub3_node, 0, 1);
@@ -151,6 +151,5 @@ Aidge::Tensor Aidge::loss::BCE(std::shared_ptr<Tensor>& prediction,
 	outputGrad->copyFrom(gradient_op->getOutput(0)->clone()); // Update gradient
 	
 	const std::shared_ptr<OperatorTensor> loss_op = std::dynamic_pointer_cast<OperatorTensor>(loss_node->getOperator());
-	std::shared_ptr<Tensor> loss = loss_op->getOutput(0);
     return loss_op->getOutput(0)->clone(); // Return loss
 }