Dockerfile, entrypoint: deprecate RPC_NODE environment (#333)

Currently, we prefer passing the ronin params through RONIN_PARAMS environment.
Using RPC_NODE environment makes some ronin params take the default value which
overwrites the params passed in RONIN_PARAMS. This commit removes use of
RPC_NODE environment.

Dockerfile

@@ -19,7 +19,6 @@ ENV VERBOSITY 3
 ENV SYNC_MODE 'snap'
 ENV NETWORK_ID '2021'
 ENV ETHSTATS_ENDPOINT ''
-ENV RPC_NODE ''
 ENV NODEKEY ''
 ENV FORCE_INIT 'true'
 ENV RONIN_PARAMS ''

docker/chainnode/entrypoint.sh

@@ -144,11 +144,6 @@ if [[ ! -z $SYNC_MODE ]]; then
   syncmode="$SYNC_MODE"
 fi
 
-# debug mode - enable rpc and disable local transactions
-if [[ ! -z $RPC_NODE ]]; then
-  params="$params --gcmode archive --http.api eth,net,web3,debug,consortium --txpool.nolocals"
-fi
-
 # ethstats
 if [[ ! -z $ETHSTATS_ENDPOINT ]]; then
   params="$params --ethstats $ETHSTATS_ENDPOINT"