Fix "unused variable" warnings (errors) detected with GCC 4.7.0 - trivial fixes

src/pld/virtex2.c

@@ -175,7 +175,6 @@ static int virtex2_load(struct pld_device *pld_device, const char *filename)
 COMMAND_HANDLER(virtex2_handle_read_stat_command)
 {
 	struct pld_device *device;
-	struct virtex2_pld_device *virtex2_info;
 	uint32_t status;
 
 	if (CMD_ARGC < 1)
@@ -193,8 +192,6 @@ COMMAND_HANDLER(virtex2_handle_read_stat_command)
 		return ERROR_OK;
 	}
 
-	virtex2_info = device->driver_priv;
-
 	virtex2_read_stat(device, &status);
 
 	command_print(CMD_CTX, "virtex2 status register: 0x%8.8" PRIx32 "", status);