[Keyboard] move Salicylic-acid3's keyboards to salicylic-acid3/ (#15791)

keyboards/salicylic_acid3/setta21/rev1/rev1.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "setta21.h"
+
+#define LAYOUT_numpad_6x4( \
+       L05, L15, L25, L35, \
+       L04, L14, L24, L34, \
+       L03, L13, L23,      \
+       L02, L12, L22, L32, \
+       L01, L11, L21,      \
+       L00,      L20, L30  \
+  ) \
+  { \
+    {  L00,  L01,  L02,  L03,  L04,  L05  },  \
+    {KC_NO,  L11,  L12,  L13,  L14,  L15  },  \
+    {  L20,  L21,  L22,  L23,  L24,  L25  },  \
+    {  L30,KC_NO,  L32,KC_NO,  L34,  L35  }   \
+  }