hgignore: cleanup obsolete entries.
R=golang-dev, dave, r
CC=golang-dev
https://golang.org/cl/9935043
diff --git a/.hgignore b/.hgignore
index b140555..d85ce37 100644
--- a/.hgignore
+++ b/.hgignore
@@ -32,7 +32,6 @@
misc/goplay/goplay
misc/osx/*.pkg
misc/osx/*.dmg
-src/cmd/6a/6a
src/cmd/?a/y.output
src/cmd/?l/enam.c
src/cmd/cc/y.output
@@ -40,10 +39,6 @@
src/cmd/gc/mkbuiltin1
src/cmd/gc/opnames.h
src/cmd/gc/y.output
-src/pkg/exp/norm/maketables
-src/pkg/exp/norm/maketesttables
-src/pkg/exp/norm/normregtest
-src/pkg/exp/ebnflint/ebnflint
src/pkg/go/doc/headscan
src/pkg/runtime/goc2c
src/pkg/runtime/mkversion
