Move M260_M261 to cpp

Marlin/src/Marlin.cpp

@@ -84,6 +84,7 @@
 
 #if ENABLED(EXPERIMENTAL_I2CBUS)
   #include "feature/twibus.h"
+  TWIBus i2c;
 #endif
 
 #if ENABLED(I2C_POSITION_ENCODERS)
@@ -98,10 +99,6 @@
   CardReader card;
 #endif
 
-#if ENABLED(EXPERIMENTAL_I2CBUS)
-  TWIBus i2c;
-#endif
-
 #if ENABLED(G38_PROBE_TARGET)
   bool G38_move = false,
        G38_endstop_hit = false;
@@ -355,10 +352,6 @@ bool pin_is_protected(const int8_t pin) {
   return false;
 }
 
-#if ENABLED(EXPERIMENTAL_I2CBUS)
-  #include "gcode/feature/i2c/M260_M261.h"
-#endif
-
 #if HAS_SERVOS
   #include "gcode/control/M280.h"
 #endif