IVGCVSW-2071 : remove GetCompute() from the WorkloadFactory interface

Change-Id: I44a9d26d1a5d876d381aee4c6450af62811d0dbb
diff --git a/src/backends/WorkloadFactory.hpp b/src/backends/WorkloadFactory.hpp
index 2d482e0..2f422ab 100644
--- a/src/backends/WorkloadFactory.hpp
+++ b/src/backends/WorkloadFactory.hpp
@@ -21,7 +21,7 @@
 public:
     virtual ~IWorkloadFactory() { }
 
-    virtual Compute GetCompute() const = 0;
+    virtual const BackendId& GetBackendId() const = 0;
 
     /// Informs the memory manager that the network is finalized and ready for execution.
     virtual void Finalize() { }