Multi-line comments cleanup (#19535)

Marlin/src/pins/stm32f4/pins_FYSETC_S6_V2_0.h

@@ -16,7 +16,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  *
  */
 #pragma once

Marlin/src/pins/stm32f4/pins_RUMBA32_common.h

@@ -23,7 +23,6 @@
 
 /**
  * Common pin assignments for all RUMBA32 boards
- *
  */
 
 #if NOT_TARGET(STM32F4)