clean up tmp after usage

Author: Blargian

scripts/prep-from-master.sh

@@ -7,4 +7,5 @@ array_root=($npm_package_config_prep_array_root)
 array_en=($npm_package_config_prep_array_en)
 ch_temp=/tmp/ch_temp_$RANDOM && mkdir -p $ch_temp && git clone --depth 1 --branch master https://github.com/ClickHouse/ClickHouse $ch_temp
 
-bash scripts/prep-from-local.sh "$ch_temp"
+bash scripts/prep-from-local.sh "$ch_temp"
+rm -rf $ch_temp