default again to current doc defaults

examples/device-dashboard/Makefile

@@ -49,8 +49,6 @@ ifeq ($(TLS), mbedtls)
 CFLAGS += -DMG_TLS=MG_TLS_MBED -Wno-conversion -Imbedtls/include
 CFLAGS += -DMBEDTLS_CONFIG_FILE=\"mbedtls_config.h\" mbedtls/library/*.c
 $(PROG): mbedtls
-else
-CFLAGS += -DMG_TLS=MG_TLS_BUILTIN
 endif
 
 # Cleanup. Delete built program and all build artifacts

examples/stm32/nucleo-f746zg-make-baremetal-builtin/Makefile

@@ -13,7 +13,6 @@ SOURCES += mongoose.c net.c packed_fs.c
 
 # Example specific build options. See README.md
 CFLAGS += -DHTTP_URL=\"http://0.0.0.0/\" -DHTTPS_URL=\"https://0.0.0.0/\"
-CFLAGS += -DMG_TLS=MG_TLS_BUILTIN
 
 ifeq ($(OS),Windows_NT)
   RM = cmd /C del /Q /F /S