Revert "✨ BigTreeTech Manta M4P, M5P, M8P V1.0 / 1.1, E3 EZ (MarlinFirmware#25001)"

This reverts commit 2bc711c.

Author: Alex Muthmann

Marlin/src/core/boards.h

@@ -545,16 +545,6 @@
   #include "stm32f1/pins_BTT_SKR_MINI_E3_V2_0.h"  // STM32F1                              env:STM32F103RC_btt env:STM32F103RC_btt_USB env:STM32F103RE_btt env:STM32F103RE_btt_USB env:STM32F103RC_btt_maple env:STM32F103RC_btt_USB_maple env:STM32F103RE_btt_maple env:STM32F103RE_btt_USB_maple
 #elif MB(BTT_SKR_MINI_E3_V3_0)
   #include "stm32g0/pins_BTT_SKR_MINI_E3_V3_0.h"  // STM32G0                              env:STM32G0B1RE_btt env:STM32G0B1RE_btt_xfer
-#elif MB(BTT_MANTA_M4P_V1_0)
-  #include "stm32g0/pins_BTT_MANTA_M4P_V1_0.h"    // STM32G0                              env:STM32G0B1RE_btt env:STM32G0B1RE_btt_xfer
-#elif MB(BTT_MANTA_M5P_V1_0)
-  #include "stm32g0/pins_BTT_MANTA_M5P_V1_0.h"    // STM32G0                              env:STM32G0B1RE_btt env:STM32G0B1RE_btt_xfer
-#elif MB(BTT_MANTA_E3_EZ_V1_0)
-  #include "stm32g0/pins_BTT_MANTA_E3_EZ_V1_0.h"  // STM32G0                              env:STM32G0B1RE_btt env:STM32G0B1RE_btt_xfer
-#elif MB(BTT_MANTA_M8P_V1_0)
-  #include "stm32g0/pins_BTT_MANTA_M8P_V1_0.h"    // STM32G0                              env:STM32G0B1VE_btt env:STM32G0B1VE_btt_xfer
-#elif MB(BTT_MANTA_M8P_V1_1)
-  #include "stm32g0/pins_BTT_MANTA_M8P_V1_1.h"    // STM32G0                              env:STM32G0B1VE_btt env:STM32G0B1VE_btt_xfer
 #elif MB(BTT_SKR_MINI_E3_V3_0_1)
   #include "stm32f4/pins_BTT_SKR_MINI_E3_V3_0_1.h"// STM32F4                              env:STM32F401RC_btt
 #elif MB(BTT_SKR_MINI_MZ_V1_0)

Marlin/src/pins/pins.h

@@ -21,8 +21,6 @@
  */
 #pragma once
 
-#include "env_validate.h"
-
 /** CAUTION **
  * This board definition is to facilitate support for a Filament Extrusion
  * devices, used to convert waste plastic into 3D printable filament.