Remove legacy docs and gallery

gallery/app.yaml

Index: gallery/app.yaml
diff --git a/gallery/app.yaml b/gallery/app.yaml
deleted file mode 100644
index 88da32857978ef77c6b70bfabd59a39c0d878f8f..0000000000000000000000000000000000000000
--- a/gallery/app.yaml
+++ /dev/null
@@ -1,30 +0,0 @@
-application: nacl-gallery
-version: 7
-runtime: python
-api_version: 1
-
-# Skip files associated with Chrome Web Store uploading
-# Note: We have to include the default skips or else it gets overridden
-skip_files:
-- ^(.*/)?app\.yaml
-- ^(.*/)?app\.yml
-- ^(.*/)?index\.yaml
-- ^(.*/)?index\.yml
-- ^(.*/)?#.*#
-- ^(.*/)?.*~
-- ^(.*/)?.*\.py[co]
-- ^(.*/)?.*/RCS/.*
-- ^(.*/)?\..*
-- ^(.*/)?.*/cws/.*
-
-handlers:
-- url: /
-  static_files: static/index.html
-  upload: static/index.html
-- url: /(.+\.(nmf|nexe))
-  static_files: static/\1
-  upload: static/(.+\.(nmf|nexe))
-  mime_type: application/x-nacl
-- url: /(.+)
-  static_files: static/\1
-  upload: static/(.+)