Migrate build target markers to keyboard.json - R (#23542)

keyboards/rocketboard_16/keyboard.json

@@ -8,6 +8,20 @@
         "pid": "0xFF16",
         "device_version": "0.0.1"
     },
+    "build": {
+        "lto": true
+    },
+    "features": {
+        "bootmagic": true,
+        "command": true,
+        "console": true,
+        "encoder": true,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true,
+        "oled": true,
+        "rgblight": true
+    },
     "processor": "STM32F103",
     "bootloader": "stm32duino",
     "matrix_pins": {

keyboards/rocketboard_16/rules.mk

@@ -4,21 +4,4 @@ MCU_LDSCRIPT = STM32F103xB
 # Extra include
 SRC += keycode_lookup.c
 
-# Build Options
-#   change yes to no to disable
-#
-BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
-MOUSEKEY_ENABLE = yes       # Mouse keys
-EXTRAKEY_ENABLE = yes       # Audio control and System control
-CONSOLE_ENABLE = yes        # Console for debug
-COMMAND_ENABLE = yes        # Commands for debug and configuration
-NKRO_ENABLE = yes           # Enable N-Key Rollover
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
-RGBLIGHT_ENABLE = yes       # Enable keyboard RGB backlit keys
-AUDIO_ENABLE = no           # Audio output
-OLED_ENABLE = yes
-ENCODER_ENABLE = yes
-
 RAW_ENABLE = yes            # Enables HID RAW communication between the board and the PC
-
-LTO_ENABLE = yes