🔨 Clean up some BTT envs, etc. (#25934)

Followup to #25921

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

buildroot/share/PlatformIO/boards/marlin_CREALITY_STM32F401RC.json

@@ -1,65 +0,0 @@
-{
-  "build": {
-    "core": "stm32",
-    "cpu": "cortex-m4",
-    "extra_flags": "-DSTM32F401xx",
-    "f_cpu": "84000000L",
-    "hwids": [
-      [
-        "0x1EAF",
-        "0x0003"
-      ],
-      [
-        "0x0483",
-        "0x3748"
-      ]
-    ],
-    "ldscript": "ldscript.ld",
-    "mcu": "stm32f401rct6",
-    "variant": "MARLIN_CREALITY_STM32F401RC"
-  },
-  "debug": {
-    "jlink_device": "STM32F401RC",
-    "openocd_target": "stm32f4x",
-    "svd_path": "STM32F40x.svd",
-    "tools": {
-      "stlink": {
-        "server": {
-          "arguments": [
-            "-f",
-            "scripts/interface/stlink.cfg",
-            "-c",
-            "transport select hla_swd",
-            "-f",
-            "scripts/target/stm32f4x.cfg",
-            "-c",
-            "reset_config none"
-          ],
-          "executable": "bin/openocd",
-          "package": "tool-openocd"
-        }
-      }
-    }
-  },
-  "frameworks": [
-    "arduino",
-    "stm32cube"
-  ],
-  "name": "STM32F401RC (64k RAM. 256k Flash)",
-  "upload": {
-    "disable_flushing": false,
-    "maximum_ram_size": 65536,
-    "maximum_size": 262144,
-    "protocol": "stlink",
-    "protocols": [
-      "stlink",
-      "dfu",
-      "jlink"
-    ],
-    "require_upload_port": true,
-    "use_1200bps_touch": false,
-    "wait_for_upload_port": false
-  },
-  "url": "https://www.st.com/en/microcontrollers-microprocessors/stm32f401rc.html",
-  "vendor": "Generic"
-}

buildroot/share/PlatformIO/boards/marlin_STM32H723VE.json

@@ -1,61 +0,0 @@
-{
-  "build": {
-    "core": "stm32",
-    "cpu": "cortex-m7",
-    "extra_flags": "-DSTM32H7xx -DSTM32H723xx",
-    "f_cpu": "550000000L",
-    "mcu": "stm32h723vet6",
-    "product_line": "STM32H723xx",
-    "variant": "MARLIN_H723VE"
-  },
-  "connectivity": [
-    "can",
-    "ethernet"
-  ],
-  "debug": {
-    "jlink_device": "STM32H723VE",
-    "openocd_target": "stm32h7x",
-    "svd_path": "STM32H7x3.svd",
-    "tools": {
-      "stlink": {
-        "server": {
-          "arguments": [
-            "-f",
-            "scripts/interface/stlink.cfg",
-            "-c",
-            "transport select hla_swd",
-            "-f",
-            "scripts/target/stm32h7x.cfg",
-            "-c",
-            "reset_config none"
-          ],
-          "executable": "bin/openocd",
-          "package": "tool-openocd"
-        }
-      }
-    }
-  },
-  "frameworks": [
-    "arduino",
-    "stm32cube"
-  ],
-  "name": "STM32H723VE (564k RAM. 512k Flash)",
-  "upload": {
-    "disable_flushing": false,
-    "maximum_ram_size": 577536,
-    "maximum_size": 524288,
-    "protocol": "stlink",
-    "protocols": [
-      "stlink",
-      "dfu",
-      "jlink",
-      "cmsis-dap"
-    ],
-    "offset_address": "0x8020000",
-    "require_upload_port": true,
-    "use_1200bps_touch": false,
-    "wait_for_upload_port": false
-  },
-  "url": "https://www.st.com/en/microcontrollers-microprocessors/stm32h723ve.html",
-  "vendor": "ST"
-}