test: delete bugs directory

It appears to be a vestigial holding ground for bugs.
But we have an issue tracker, and #1909 is there and open.

Change-Id: I912ff222a24c51fab483be0c67dad534f5a84488
Reviewed-on: https://go-review.googlesource.com/31859Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/path/filepath/path_test.go

@@ -1295,7 +1295,7 @@ func TestBug3486(t *testing.T) { // https://golang.org/issue/3486
 	if err != nil {
 		t.Fatal(err)
 	}
-	bugs := filepath.Join(root, "bugs")
+	bugs := filepath.Join(root, "fixedbugs")
 	ken := filepath.Join(root, "ken")
 	seenBugs := false
 	seenKen := false
@@ -1310,7 +1310,7 @@ func TestBug3486(t *testing.T) { // https://golang.org/issue/3486
 			return filepath.SkipDir
 		case ken:
 			if !seenBugs {
-				t.Fatal("filepath.Walk out of order - ken before bugs")
+				t.Fatal("filepath.Walk out of order - ken before fixedbugs")
 			}
 			seenKen = true
 		}

test/bugs/bug395.go

-// skip
-
-// When issue 1909 is fixed, change from skip to compile.
-
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Issue 1909
-// Would OOM due to exponential recursion on Foo's expanded methodset in nodefmt
-
-package test
-
-type Foo interface {
-	Bar() interface {
-		Foo
-	}
-	Baz() interface {
-		Foo
-	}
-	Bug() interface {
-		Foo
-	}
-}

test/bugs/placeholder

-This file keeps Mercurial from deleting the directory
-when there are no known bugs.

test/run.go

@@ -52,7 +52,7 @@ var (
 
 	// dirs are the directories to look for *.go files in.
 	// TODO(bradfitz): just use all directories?
-	dirs = []string{".", "ken", "chan", "interface", "syntax", "dwarf", "fixedbugs", "bugs"}
+	dirs = []string{".", "ken", "chan", "interface", "syntax", "dwarf", "fixedbugs"}
 
 	// ratec controls the max number of tests running at a time.
 	ratec chan bool