Almost every pragma change on PR

That's almost finished, only waiting for reply due to compiling errors

keyboards/gonnerd/config.h

@@ -1,5 +1,4 @@
-#ifndef CONFIG_H
-#define CONFIG_H
+#pragma once
 
 #include "config_common.h"
 
@@ -38,6 +37,4 @@
 /* key combination for magic key command */
 #define IS_COMMAND() ( \
     keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \
-)
-
-#endif
+)

keyboards/handwired/bluepill/bluepill70/bluepill70.h

@@ -1,6 +1,4 @@
-#ifndef BLUEPILL70_H
-#define BLUEPILL70_H
+#pragma once
 #include "bluepill.h"
 //  Modified by Xydane
-//	#define LAYOUT(k00) {{ k00 }}
-#endif
+//	#define LAYOUT(k00) {{ k00 }}

keyboards/handwired/bluepill/bluepill70/config.h

@@ -1,5 +1,4 @@
-#ifndef STM70_CONFIG_H_
-#define STM70_CONFIG_H_
+#pragma once
 
 /* USB Device descriptor parameter */
 #define VENDOR_ID       0xFEED
@@ -23,6 +22,4 @@
 
 // Iso fix for Space Cadet, comment for ANSI layouts
 #define LSPO_KEY KC_8
-#define RSPC_KEY KC_9
-
-#endif /* STM70_CONFIG_H_ */
+#define RSPC_KEY KC_9

keyboards/handwired/bluepill/config.h

@@ -15,8 +15,7 @@ You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef CONFIG_H
-#define CONFIG_H
+#pragma once
 
 /* define if matrix has ghost */
 //#define MATRIX_HAS_GHOST
@@ -56,6 +55,4 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //#define NO_ACTION_TAPPING
 //#define NO_ACTION_ONESHOT
 //#define NO_ACTION_MACRO
-//#define NO_ACTION_FUNCTION
-
-#endif
+//#define NO_ACTION_FUNCTION