Remove support for javascript map-reduce functions and commit hooks

Index: deps/riak_kv/rebar.config
--- deps/riak_kv/rebar.config.orig
+++ deps/riak_kv/rebar.config
@@ -28,7 +28,7 @@
 
 {deps, [
         {sidejob, ".*", {git, "git://github.com/basho/sidejob.git", {branch, "2.0"}}},
-        {erlang_js, ".*", {git, "git://github.com/basho/erlang_js.git", {tag, "1.3.0"}}},
+%%        {erlang_js, ".*", {git, "git://github.com/basho/erlang_js.git", {tag, "1.3.0"}}},
         {bitcask, ".*", {git, "git://github.com/basho/bitcask.git", {tag, "2.0.8"}}},
         {eper, ".*", {git, "git://github.com/basho/eper.git", {tag, "0.78"}}},
         {sext, ".*", {git, "git://github.com/basho/sext.git", {tag, "1.1p3"}}},
