⚰️ Remove obsolete CUSTOM_SPI_PINS (#22058)

Marlin/src/HAL/STM32/HAL_SPI.cpp

@@ -163,11 +163,9 @@ static SPISettings spiConfig;
     }
     spiConfig = SPISettings(clock, MSBFIRST, SPI_MODE0);
 
-    #if ENABLED(CUSTOM_SPI_PINS)
-      SPI.setMISO(SD_MISO_PIN);
-      SPI.setMOSI(SD_MOSI_PIN);
-      SPI.setSCLK(SD_SCK_PIN);
-    #endif
+    SPI.setMISO(SD_MISO_PIN);
+    SPI.setMOSI(SD_MOSI_PIN);
+    SPI.setSCLK(SD_SCK_PIN);
 
     SPI.begin();
   }