Remove old util_cpack and util_upack core

All projects have been updated to use the new pack/unpack infrastructure.
The old util_cpack and util_upack cores are now unused an can be removed.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

library/Makefile

@@ -91,7 +91,6 @@ clean:
 	$(MAKE) -C util_cdc clean
 	$(MAKE) -C util_cic clean
 	$(MAKE) -C util_clkdiv clean
-	$(MAKE) -C util_cpack clean
 	$(MAKE) -C util_dacfifo clean
 	$(MAKE) -C util_delay clean
 	$(MAKE) -C util_extract clean
@@ -106,7 +105,6 @@ clean:
 	$(MAKE) -C util_rfifo clean
 	$(MAKE) -C util_sigma_delta_spi clean
 	$(MAKE) -C util_tdd_sync clean
-	$(MAKE) -C util_upack clean
 	$(MAKE) -C util_var_fifo clean
 	$(MAKE) -C util_wfifo clean
 	$(MAKE) -C xilinx/axi_adcfifo clean
@@ -201,7 +199,6 @@ lib:
 	$(MAKE) -C util_cdc
 	$(MAKE) -C util_cic
 	$(MAKE) -C util_clkdiv
-	$(MAKE) -C util_cpack
 	$(MAKE) -C util_dacfifo
 	$(MAKE) -C util_delay
 	$(MAKE) -C util_extract
@@ -216,7 +213,6 @@ lib:
 	$(MAKE) -C util_rfifo
 	$(MAKE) -C util_sigma_delta_spi
 	$(MAKE) -C util_tdd_sync
-	$(MAKE) -C util_upack
 	$(MAKE) -C util_var_fifo
 	$(MAKE) -C util_wfifo
 	$(MAKE) -C xilinx/axi_adcfifo