Drop dependency on mysql in the OSS build (#87)

Summary:
This dep only exists for an instance of MySQL.Param, which is used no where in the OSS code.
Drop the dep entirely.

There's a separate fix to mysql-simple over on paul-rouse/mysql-simple#56 , but we don't need to wait for it.

Pull Request resolved: #87

Reviewed By: simonmar

Differential Revision: D36756634

Pulled By: pepeiborra

fbshipit-source-id: 719fb04f64657f7f6cbbc3f68cc765e76c0d63b3

README.md

@@ -118,7 +118,6 @@ not have IPv6 configured.
 sudo apt install \
     libgoogle-glog-dev \
     libgflags-dev \
-    libmysqlclient-dev \
     bison \
     flex \
     ninja-build \
@@ -149,8 +148,7 @@ sudo yum install \
      pcre-devel \
      ncurses-devel \
      fmt-devel \
-     gmp-devel \
-     community-mysql-devel
+     gmp-devel
 ```
 
 Also you may need:

common/util/Util/TimeSec.hs

@@ -18,7 +18,6 @@ module Util.TimeSec
   , PPTimeSpanGranularity(..)
   ) where
 
-import Database.MySQL.Simple.Param
 import Data.Aeson
 import Data.Text (Text)
 import qualified Data.Text as Text
@@ -39,9 +38,6 @@ newtype Time = Time { timeInSeconds :: Int }
 instance NFData   Time
 instance Hashable Time
 
-instance Param Time where
-  render = render . timeInSeconds
-
 -- | 'TimeSpan' means a time difference, duration in seconds,
 -- as opposed to 'Time', which is a specific point in time
 -- (a unix timestamp).

common/util/fb-util.cabal

@@ -191,7 +191,6 @@ library
         aeson-pretty,
         either,
         QuickCheck,
-        mysql-simple,
         scientific,
         haskell-src-exts,
         stm,