golangci-lint: remove gocognit and gocyclo

Some complexities can't be avoided ;)

.golangci.yml

@@ -63,14 +63,6 @@ linters-settings:
     # See https://github.com/kisielk/errcheck#excluding-functions for details.
     exclude: ./.errcheck-excludes
 
-  gocognit:
-    # Minimal code complexity to report, 30 by default.
-    min-complexity: 20
-
-  gocyclo:
-    # Minimal code complexity to report, 30 by default.
-    min-complexity: 20
-
   goimports:
     # Put imports beginning with prefix after 3rd-party packages. It's a
     # comma-separated list of prefixes.

internal/controller/controller.go

@@ -257,7 +257,6 @@ func (c *Controller) processNextWorkItem() bool {
 
 // syncHandler gets a PrometheusRule from the queue and updates the
 // corresponding absent metric alert PrometheusRule for it.
-//nolint:gocyclo,gocognit
 func (c *Controller) syncHandler(key string) error {
 	// Convert the namespace/name string into a distinct namespace and name.
 	namespace, name, err := cache.SplitMetaNamespaceKey(key)