runtime/internal/atomic: delete arch1_*.go files

I made a copy of the per-arch _CacheLineSize definitons when checking in
runtime/internal/atomic. Now that runtime/internal/sys is checked in,
we can use the definition there.

Change-Id: I7242f6b633e4164f033b67ff471416b9d71c64d2
Reviewed-on: https://go-review.googlesource.com/16847
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/src/cmd/dist/deps.go b/src/cmd/dist/deps.go
index 4e20b56..ba360e5 100644
--- a/src/cmd/dist/deps.go
+++ b/src/cmd/dist/deps.go
@@ -41,7 +41,7 @@
 	"regexp":                  {"bytes", "errors", "io", "math", "regexp/syntax", "runtime", "runtime/internal/atomic", "runtime/internal/sys", "sort", "strconv", "strings", "sync", "sync/atomic", "unicode", "unicode/utf8"},
 	"regexp/syntax":           {"bytes", "errors", "io", "math", "runtime", "runtime/internal/atomic", "runtime/internal/sys", "sort", "strconv", "strings", "sync", "sync/atomic", "unicode", "unicode/utf8"},
 	"runtime":                 {"runtime/internal/atomic", "runtime/internal/sys"},
-	"runtime/internal/atomic": {},
+	"runtime/internal/atomic": {"runtime/internal/sys"},
 	"runtime/internal/sys":    {},
 	"sort":                    {"runtime", "runtime/internal/atomic", "runtime/internal/sys"},
 	"strconv":                 {"errors", "math", "runtime", "runtime/internal/atomic", "runtime/internal/sys", "unicode/utf8"},