chore: Golangci: remove deprecated plugins (and decorder) (#64)

golangci: remove deprecated plugins (and decorder)

Some plugins are no longer supported and can be removed. I am also proposing we remove decorder: until it has the ability to automatically fix the issues it reports, we are wasting our time for (imo) little gain.

Author: hermanschaaf

.golangci.yml

@@ -68,8 +68,6 @@ linters:
   enable:
     - asciicheck
     - bodyclose
-    - deadcode
-    - decorder
     - depguard
     - dupl
     - errcheck
@@ -85,8 +83,6 @@ linters:
     - prealloc
     - revive
     - staticcheck
-    - structcheck
     - unconvert
     - unparam
     - unused
-    - varcheck