Remove examples

examples/ESP8266_RTOS/build.sh

@@ -1,10 +0,0 @@
-#!/bin/bash
-
-docker run \
-  --rm -i -v $(realpath ${PWD}/../..):/src \
-  --entrypoint=/bin/bash $(cat sdk.version) -l -c -x '
-    export SDK_PATH=/opt/Espressif/ESP8266_SDK;
-    export BIN_PATH=./bin;
-    cd /src/examples/ESP8266_RTOS &&
-    mkdir -p ./bin && make clean &&
-    make BOOT=none APP=0 SPI_SPEED=40 SPI_MODE=qio SPI_SIZE_MAP=0'