gopls: remove dead analysis code

Change-Id: I1650a5b6b5a754438db2308e8e27da228bba939c
Reviewed-on: https://go-review.googlesource.com/c/tools/+/459790
TryBot-Result: Gopher Robot <gobot@golang.org>
gopls-CI: kokoro <noreply+kokoro@google.com>
Auto-Submit: Robert Findley <rfindley@google.com>
Reviewed-by: Alan Donovan <adonovan@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>

gopls/internal/lsp/cache/analysis.go

@@ -1130,14 +1130,6 @@ func (act *action) exec() (interface{}, *actionSummary, error) {
 	}, nil
 }
 
-func factType(fact analysis.Fact) reflect.Type {
-	t := reflect.TypeOf(fact)
-	if t.Kind() != reflect.Ptr {
-		panic(fmt.Sprintf("invalid Fact type: got %T, want pointer", fact))
-	}
-	return t
-}
-
 // requiredAnalyzers returns the transitive closure of required analyzers in preorder.
 func requiredAnalyzers(analyzers []*analysis.Analyzer) []*analysis.Analyzer {
 	var result []*analysis.Analyzer

gopls/internal/lsp/source/options.go

@@ -1394,31 +1394,6 @@ func (r *OptionResult) setStringSlice(s *[]string) {
 	}
 }
 
-// EnabledAnalyzers returns all of the analyzers enabled by the options.
-func EnabledAnalyzers(options *Options) (analyzers []*Analyzer) {
-	for _, a := range options.DefaultAnalyzers {
-		if a.IsEnabled(options) {
-			analyzers = append(analyzers, a)
-		}
-	}
-	for _, a := range options.TypeErrorAnalyzers {
-		if a.IsEnabled(options) {
-			analyzers = append(analyzers, a)
-		}
-	}
-	for _, a := range options.ConvenienceAnalyzers {
-		if a.IsEnabled(options) {
-			analyzers = append(analyzers, a)
-		}
-	}
-	for _, a := range options.StaticcheckAnalyzers {
-		if a.IsEnabled(options) {
-			analyzers = append(analyzers, a)
-		}
-	}
-	return analyzers
-}
-
 func typeErrorAnalyzers() map[string]*Analyzer {
 	return map[string]*Analyzer{
 		fillreturns.Analyzer.Name: {