Remove most path-based golangci exclusions (#24214)

They are non-obvious and do not survive refactor.

Will replace with `//nolint` comments after CI results are in.

models/migrations/v1_14/v157.go

@@ -8,13 +8,13 @@ import (
 )
 
 func FixRepoTopics(x *xorm.Engine) error {
-	type Topic struct {
+	type Topic struct { //nolint:unused
 		ID        int64  `xorm:"pk autoincr"`
 		Name      string `xorm:"UNIQUE VARCHAR(25)"`
 		RepoCount int
 	}
 
-	type RepoTopic struct {
+	type RepoTopic struct { //nolint:unused
 		RepoID  int64 `xorm:"pk"`
 		TopicID int64 `xorm:"pk"`
 	}