Update readme

README.md

@@ -3,42 +3,3 @@
 purescript-postgresql-client is a PostgreSQL client library for PureScript.
 
 To use this library, you need to add `pg` as an npm dependency.
-
-Included is an optional preprocessor, purspgpp, which finds embedded SQL
-queries in PureScript source files and infers their types. Such queries can be
-written as follows:
-
-```purescript
-userName = [query|
-    SELECT first_name, last_name
-    FROM users
-    WHERE id = $1
-|]
-```
-
-purspgpp will replace this by something like the following:
-
-```purescript
-(Query """
-    SELECT first_name, last_name
-    FROM users
-    WHERE id = $1
-""" :: Query (Tuple UUID Unit) (Tuple String (Tuple String Unit))
-```
-
-You can integrate purspgpp into your build system. For example, here is a
-PowerShell script that executes it for all `.purspg` files:
-
-```powershell
-Get-ChildItem src -Recurse -Filter *.purspg `
-| ForEach-Object {
-    perl6 `
-        bower_components/purescript-postgresql-client/purspgpp `
-        "user=postgres password=lol123 dbname=nn" `
-        "$($_.FullName)" `
-        "$([IO.Path]::ChangeExtension($_.FullName, "purs"))"
-    if (!$?) {
-        Write-Error "Unable to preprocess $_"
-    }
-}
-```