[Bug] Revert Assymmetrical Split Encoder support (#12090) (#15311)

* Revert "fix broken macro in transport.h (#15239)"

This reverts commit 06f18e22d9.

* Revert "Rework encoders to enable asymmetric split keyboards (#12090)"

This reverts commit 32215d5bff.

quantum/encoder.h

@@ -17,8 +17,7 @@
 
 #pragma once
 
-#include <stdbool.h>
-#include <stdint.h>
+#include "quantum.h"
 
 void encoder_init(void);
 bool encoder_read(void);