Move MatrixAPIEventFormat enum to matrix-api-types.h

src/matrix-api.h

@@ -82,12 +82,6 @@ typedef enum {
     MATRIX_API_EVENT_DIRECTION_BACKWARD
 } MatrixAPIEventDirection;
 
-typedef enum {
-    MATRIX_API_EVENT_FORMAT_DEFAULT,
-    MATRIX_API_EVENT_FORMAT_CLIENT,
-    MATRIX_API_EVENT_FORMAT_FEDERATION
-} MatrixAPIEventFormat;
-
 typedef enum {
     MATRIX_API_RECEIPT_TYPE_READ
 } MatrixAPIReceiptType;