Revert "Fix build: led-7seg.c requires sol-gpio.h"
Revert "Fix build: led-7seg.c requires sol-gpio.h"

This reverts commit 2b0ec252d8200fe982ff5be964625ae57aac5ba6.

thiagomacieira/soletta,thiagomacieira/soletta,thiagomacieira/soletta,thiagomacieira/soletta,thiagomacieira/soletta,thiagomacieira/soletta