update command setting to the correct default

keyboards/planck/ez/config.h

@@ -80,11 +80,6 @@
  */
 //#define FORCE_NKRO
 
-/* key combination for magic key command */
-#define IS_COMMAND() ( \
-  keyboard_report->mods == (MOD_BIT(KC_LSHIFT) | MOD_BIT(KC_RSHIFT)) \
-)
-
 /*
  * Feature disable options
  *  These options are also useful to firmware size reduction.