Fix description

- golangci/golangci-lint#4310

spancheck.go

@@ -1,14 +1,10 @@
 package spancheck
 
 import (
- _ "embed"
  "go/ast"
- "go/parser"
- "go/token"
  "go/types"
  "log"
  "regexp"
- "strings"
 
  "golang.org/x/tools/go/analysis"
  "golang.org/x/tools/go/analysis/passes/ctrlflow"
@@ -17,9 +13,6 @@ import (
  "golang.org/x/tools/go/cfg"
 )
 
-//go:embed doc.go
-var doc string
-
 const stackLen = 32
 
 // spanType differentiates span types.
@@ -48,7 +41,7 @@ func newAnalyzer(config *Config) *analysis.Analyzer {
 
  return &analysis.Analyzer{
  Name: "spancheck",
- Doc: extractDoc(doc, "spancheck"),
+ Doc: "checks for mistakes with OpenTelemetry/Census spans",
  Flags: config.fs,
  Run: run(config),
  Requires: []*analysis.Analyzer{
@@ -436,40 +429,3 @@ func errorsByArg(pass *analysis.Pass, call *ast.CallExpr) []bool {
 func isErrorType(t types.Type) bool {
  return types.Implements(t, errorType)
 }
-
-// extractDoc extracts the doc comment for the analyzer with the given name.
-// copied out of the internal go util: https://github.com/golang/tools/blob/master/internal/analysisinternal/extractdoc.go
-func extractDoc(content, name string) string {
- if content == "" {
- log.Default().Print("[WARN] empty content")
- return ""
- }
-
- fset := token.NewFileSet()
- f, err := parser.ParseFile(fset, "", content, parser.ParseComments|parser.PackageClauseOnly)
- if err != nil {
- log.Default().Print("[WARN] failed to parse doc.go", err)
- return ""
- }
-
- if f.Doc == nil {
- log.Default().Print("[WARN] no package doc comment")
- return ""
- }
-
- for _, section := range strings.Split(f.Doc.Text(), "\n# ") {
- if body := strings.TrimPrefix(section, "Analyzer "+name); body != section &&
- body != "" &&
- body[0] == '\r' || body[0] == '\n' {
- body = strings.TrimSpace(body)
- rest := strings.TrimPrefix(body, name+":")
- if rest == body {
- log.Default().Print("[ERROR] package doc comment contains no '" + name + "' heading")
- }
- return strings.TrimSpace(rest)
- }
- }
-
- log.Default().Print("[ERROR] package doc comment contains no 'Analyzer " + name + "' heading")
- return ""
-}