remove Procfile.v2 and Procfile.learner

Signed-off-by: shivanshu1333 <shivanshu1333@gmail.com>

Procfile

@@ -6,4 +6,21 @@ etcd2: bin/etcd --name infra2 --listen-client-urls http://127.0.0.1:22379 --adve
 etcd3: bin/etcd --name infra3 --listen-client-urls http://127.0.0.1:32379 --advertise-client-urls http://127.0.0.1:32379 --listen-peer-urls http://127.0.0.1:32380 --initial-advertise-peer-urls http://127.0.0.1:32380 --initial-cluster-token etcd-cluster-1 --initial-cluster 'infra1=http://127.0.0.1:12380,infra2=http://127.0.0.1:22380,infra3=http://127.0.0.1:32380' --initial-cluster-state new --enable-pprof --logger=zap --log-outputs=stderr
 #proxy: bin/etcd grpc-proxy start --endpoints=127.0.0.1:2379,127.0.0.1:22379,127.0.0.1:32379 --listen-addr=127.0.0.1:23790 --advertise-client-url=127.0.0.1:23790 --enable-pprof
 
-# A learner node can be started using Procfile.learner
+# A learner node can be started using the below Procfile.learner (uncomment and run)
+
+# Use goreman to run `go install github.com/mattn/goreman@latest`
+
+# 1. Start the cluster using Procfile
+# 2. Add learner node to the cluster
+#   % etcdctl member add infra4 --peer-urls="http://127.0.0.1:42380" --learner=true
+
+# 3. Start learner node with goreman
+# Change the path of bin/etcd if etcd is located elsewhere
+
+# uncomment below to setup
+
+# etcd4: bin/etcd --name infra4 --listen-client-urls http://127.0.0.1:42379 --advertise-client-urls http://127.0.0.1:42379 --listen-peer-urls http://127.0.0.1:42380 --initial-advertise-peer-urls http://127.0.0.1:42380 --initial-cluster-token etcd-cluster-1 --initial-cluster 'infra4=http://127.0.0.1:42380,infra1=http://127.0.0.1:12380,infra2=http://127.0.0.1:22380,infra3=http://127.0.0.1:32380' --initial-cluster-state existing --enable-pprof --logger=zap --log-outputs=stderr
+
+# 4. The learner node can be promoted to voting member by the command
+#   % etcdctl member promote <memberid>
+