golangci: fix lint and updater linter (#1691)

Fixes failing lint in main and updates linter to latest version.

category: fixbuild
ticket: none

.github/workflows/golangci-lint.yml

@@ -16,7 +16,7 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with:
-          version: v1.48.0
+          version: v1.50.1
           only-new-issues: true
 
       - name: notify failure

.golangci.yml

@@ -88,9 +88,6 @@ issues:
     - "nested-structs" # Relax revive
     - "0xhex" # Relax revive and staticcheck about our custom struct tag
     - "shadow: declaration of \"err\" shadows declaration" # Relax govet
-    - "bls_sig contains underscore" # Relax nosnakecase
-    - "v\\d_\\d contains underscore" # Relax nosnakecase
-    - "P_\\w+ contains underscore" # Relax nosnakecase
 
 linters:
   enable-all: true
@@ -122,3 +119,8 @@ linters:
     - tagliatelle
     - varnamelen
     - wsl
+    # Deprecated
+    - nosnakecase
+    - structcheck
+    - varcheck
+    - deadcode

.pre-commit-config.yaml

@@ -42,7 +42,7 @@ repos:
   # Then run code validators (on the formatted code)
 
   - repo: https://github.com/golangci/golangci-lint
-    rev: v1.48.0
+    rev: v1.50.1
     hooks:
       - id: golangci-lint
         args: [ -n ] # See .golangci.yml for config

cmd/enr_internal_test.go

@@ -27,10 +27,6 @@ import (
 	"github.com/obolnetwork/charon/p2p"
 )
 
-const (
-	compressedK1PubkeyLen = 33
-)
-
 func TestRunNewEnr(t *testing.T) {
 	temp, err := os.MkdirTemp("", "")
 	require.NoError(t, err)