IVGCVSW-6814 Remove references to armnn:BackendId in the profiling code

Signed-off-by: Cathal Corbett <cathal.corbett@arm.com>
Change-Id: Ib399a5eee9e52882800ec3e02e4173424a7c19b1
diff --git a/src/profiling/backends/BackendProfiling.hpp b/src/profiling/backends/BackendProfiling.hpp
index 545234d..bedda5d 100644
--- a/src/profiling/backends/BackendProfiling.hpp
+++ b/src/profiling/backends/BackendProfiling.hpp
@@ -19,7 +19,7 @@
 public:
     BackendProfiling(const ProfilingOptions& options,
                      IProfilingService& profilingService,
-                     const armnn::BackendId& backendId)
+                     const std::string& backendId)
             : m_Options(options),
               m_ProfilingService(profilingService),
               m_BackendId(backendId) {}
@@ -45,7 +45,7 @@
 private:
     ProfilingOptions m_Options;
     IProfilingService& m_ProfilingService;
-    armnn::BackendId m_BackendId;
+    std::string m_BackendId;
 };
 
 }    // namespace pipe