*: drop unused structure fields

Found by structcheck:
 `good` is unused (structcheck)
and alike.

pkg/compiler/vars.go

@@ -6,7 +6,6 @@ import (
 
 type varScope struct {
 	localsCnt int
-	argCnt    int
 	arguments map[string]int
 	locals    []map[string]varInfo
 }

pkg/network/helper_test.go

@@ -19,7 +19,6 @@ import (
 type testDiscovery struct {
 	sync.Mutex
 	bad          []string
-	good         []string
 	connected    []string
 	unregistered []string
 	backfill     []string

pkg/network/tcp_peer.go

@@ -58,8 +58,6 @@ type TCPPeer struct {
 	p2pSendQ chan []byte
 	hpSendQ  chan []byte
 
-	wg sync.WaitGroup
-
 	// track outstanding getaddr requests.
 	getAddrSent atomic.Int32
 

pkg/rpc/server/server.go

@@ -59,7 +59,6 @@ type (
 
 		subsLock         sync.RWMutex
 		subscribers      map[*subscriber]bool
-		subsGroup        sync.WaitGroup
 		blockSubs        int
 		executionSubs    int
 		notificationSubs int