Revert "DVT-1057 replace block data structure with LRU cache to fix m…

…emory leak (#148)"

This reverts commit 95faa01.

README.md

@@ -148,9 +148,6 @@ You can then generate some load to make sure that blocks with transactions are b
 $ polycli loadtest --verbosity 700 --chain-id 1337 --concurrency 1 --requests 1000 --rate-limit 5 --mode c --rpc-url http://127.0.0.1:8545
 ```
 
-## Monitor Debug
-`polycli monitor --rpc-url http://34.117.145.249:80 -v 700 &> log.txt`
-
 # Contributing
 
 - If you add a new loadtest mode, don't forget to update the loadtest mode string by running the following command: `cd cmd/loadtest && stringer -type=loadTestMode`. You can install [stringer](https://pkg.go.dev/golang.org/x/tools/cmd/stringer) with `go install golang.org/x/tools/cmd/stringer@latest`.

cmd/monitor/cmd.go

@@ -15,10 +15,9 @@ var (
 	usage string
 
 	// flags
-	rpcUrl          string
-	batchSizeValue  string
-	blockCacheLimit int
-	intervalStr     string
+	rpcUrl         string
+	batchSizeValue string
+	intervalStr    string
 )
 
 // MonitorCmd represents the monitor command
@@ -38,7 +37,6 @@ var MonitorCmd = &cobra.Command{
 func init() {
 	MonitorCmd.PersistentFlags().StringVarP(&rpcUrl, "rpc-url", "r", "http://localhost:8545", "The RPC endpoint url")
 	MonitorCmd.PersistentFlags().StringVarP(&batchSizeValue, "batch-size", "b", "auto", "Number of requests per batch")
-	MonitorCmd.PersistentFlags().IntVarP(&blockCacheLimit, "cache-limit", "c", 100, "Number of cached blocks for the LRU block data structure (Min 100)")
 	MonitorCmd.PersistentFlags().StringVarP(&intervalStr, "interval", "i", "5s", "Amount of time between batch block rpc calls")
 }
 
@@ -68,10 +66,5 @@ func checkFlags() (err error) {
 		}
 	}
 
-	// Check batch-size flag.
-	if blockCacheLimit < 100 {
-		return fmt.Errorf("block-cache can't be less than 100")
-	}
-
 	return nil
 }