throw operator is an exit point from the function. Next return is unnecessary

Author: laborer2008

examples/protonect/src/opencl_depth_packet_processor.cpp

@@ -508,7 +508,6 @@ class OpenCLDepthPacketProcessorImpl
     {
       std::cerr << OUT_NAME("run") "ERROR: " << err.what() << " (" << err.err() << ")" << std::endl;
       throw err;
-      return;
     }
   }