cmd, contracts, eth, p2p, signer, whisper: fixed ineffectual assignments (#19869)

Fixed assigning values to variables we don't end up using.

whisper/mailserver/server_test.go

@@ -172,7 +172,7 @@ func singleRequest(t *testing.T, server *WMailServer, env *whisper.Envelope, p *
 	}
 
 	src[0]++
-	ok, lower, upper, bloom = server.validateRequest(src, request)
+	ok, lower, upper, _ = server.validateRequest(src, request)
 	if !ok {
 		// request should be valid regardless of signature
 		t.Fatalf("request validation false negative, seed: %d (lower: %d, upper: %d).", seed, lower, upper)

whisper/whisperv6/peer.go

@@ -130,7 +130,7 @@ func (peer *Peer) handshake() error {
 		}
 	}
 
-	isRemotePeerLightNode, err := s.Bool()
+	isRemotePeerLightNode, _ := s.Bool()
 	if isRemotePeerLightNode && isLightNode && isRestrictedLightNodeConnection {
 		return fmt.Errorf("peer [%x] is useless: two light client communication restricted", peer.ID())
 	}