Update install-esp-idf.sh

Author: Jason2866

tools/install-esp-idf.sh

@@ -17,11 +17,6 @@ if [ ! -d "$IDF_PATH" ]; then
 	echo "git clone $IDF_REPO_URL -b $IDF_BRANCH"
 	git clone $IDF_REPO_URL -b $IDF_BRANCH
 	idf_was_installed="1"
-	if ! [ -d esp-idf ]; then
-                echo "git clone $IDF_REPO_URL -b $IDF_BRANCH"
-		git clone $IDF_REPO_URL -b $IDF_BRANCH
-	fi
-	export IDF_PATH="$AR_ROOT/esp-idf"
 fi
 
 # Next lines redirects ALWAYS to espressif git since this sha1 only exists there!!!