Only convert iexclude & iinclude casing once

internal/filter/filter.go

@@ -187,12 +187,3 @@ func List(patterns []string, str string) (matched bool, childMayMatch bool, err
 
 	return matched, childMayMatch, nil
 }
-
-// InsensitiveList is the same as List but case insensitive.
-func InsensitiveList(patterns []string, str string) (matched bool, childMayMatch bool, err error) {
-	str = strings.ToLower(str)
-	for index, path := range patterns {
-		patterns[index] = strings.ToLower(path)
-	}
-	return List(patterns, str)
-}

internal/filter/filter_test.go

@@ -279,33 +279,6 @@ func ExampleList() {
 	// match: true
 }
 
-var filterInsensitiveListTests = []struct {
-	patterns []string
-	path     string
-	match    bool
-}{
-	{[]string{"*.go"}, "/foo/bar/test.go", true},
-	{[]string{"test.go"}, "/foo/bar/test.go", true},
-	{[]string{"test.go"}, "/foo/bar/TEST.go", true},
-	{[]string{"BAR"}, "/foo/BAR/TEST.go", true},
-}
-
-func TestInsensitiveList(t *testing.T) {
-	for i, test := range filterInsensitiveListTests {
-		match, _, err := filter.InsensitiveList(test.patterns, test.path)
-		if err != nil {
-			t.Errorf("test %d failed: expected no error for patterns %q, but error returned: %v",
-				i, test.patterns, err)
-			continue
-		}
-
-		if match != test.match {
-			t.Errorf("test %d: filter.InsensitiveList(%q, %q): expected %v, got %v",
-				i, test.patterns, test.path, test.match, match)
-		}
-	}
-}
-
 func extractTestLines(t testing.TB) (lines []string) {
 	f, err := os.Open("testdata/libreoffice.txt.bz2")
 	if err != nil {