examples/incrementer: clean code

examples/incrementer/incrementer.c

@@ -30,8 +30,6 @@ extern void opencl_codelet(void *descr[], __attribute__ ((unused)) void *_args);
 struct starpu_opencl_program opencl_code;
 #endif
 
-extern void cuda_codelet_host(float *tab);
-
 void cpu_codelet(void *descr[], __attribute__ ((unused)) void *_args)
 {
 	float *val = (float *)STARPU_VECTOR_GET_PTR(descr[0]);