Remove unused linter

.golangci.yml

@@ -48,9 +48,7 @@ linters:
     - nakedret
     - cyclop
     - gosimple
-    - varcheck
     - unused
-    - deadcode
     - exportloopref
     - gocritic
     - forbidigo
@@ -71,9 +69,9 @@ linters-settings:
 
   gosimple:
     # Select the Go version to target. The default is '1.13'.
-    go: "1.17"
+    go: '1.17'
     # https://staticcheck.io/docs/options#checks
-    checks: ["all"]
+    checks: ['all']
 
   gocritic:
     disabled-checks: