cmd/go: fix outdated comments

Change-Id: I09532546c96b3758f76528fb5010dafc638139b8
Reviewed-on: https://go-review.googlesource.com/128135
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/go/internal/modload/import.go

@@ -42,7 +42,7 @@ func (e *ImportMissingError) Error() string {
 // If the package cannot be found in the current build list,
 // Import returns an ImportMissingError as the error.
 // If Import can identify a module that could be added to supply the package,
-// the ImportMissingErr records that module.
+// the ImportMissingError records that module.
 func Import(path string) (m module.Version, dir string, err error) {
 	if strings.Contains(path, "@") {
 		return module.Version{}, "", fmt.Errorf("import path should not have @version")

src/cmd/go/internal/modload/load.go

@@ -504,9 +504,6 @@ func (ld *loader) load(roots func() []string) {
 			}
 		}
 	}
-
-	// Check for visibility violations.
-	// TODO!
 }
 
 // pkg returns the *loadPkg for path, creating and queuing it if needed.