Remove unused extensions data in projects

Author: valencik

collections/_projects/cats.md

@@ -4,34 +4,5 @@ category: "Functional Programming"
 description: "A library intended to provide abstractions for functional programming in Scala, leveraging its unique features. Design goals are approachability, modularity, documentation and efficiency."
 permalink: "https://typelevel.org/cats/"
 github: "https://github.com/typelevel/cats"
-
 core: true
-extensions:
-  - title: Cats-Effect
-    description: "The IO Monad for Scala, plus type classes for general effect types."
-    link: "https://typelevel.org/cats-effect/"
-  - title: "FS2"
-    description: "Functional Streams for Scala, with implementations for compression, disk I/O, and TCP"
-    link: "https://typelevel.org/fs2/"
-  - title: "Cats MTL"
-    description: "Monad transformers made easy"
-    link: "https://typelevel.org/cats-mtl/"
-  - title: "Cats Collections"
-    description: "Data structures that facilitate pure functional programming with cats"
-    link: "https://github.com/typelevel/cats-collections"
-  - title: "Cats Tagless"
-    description: "A library of utilities for tagless final algebras"
-    link: "https://typelevel.org/cats-tagless/"
-  - title: "Alleycats"
-    description: "Lawless classes & illegal instances"
-    link: "https://github.com/typelevel/cats"
-  - title: "Mouse"
-    description: "Enrichments to standard library classes to ease functional programming"
-    link: "https://typelevel.org/mouse/"
-  - title: "Kittens"
-    description: "Automatic type class derivation"
-    link: "https://github.com/milessabin/kittens"
-  - title: "Cats-Time"
-    description: "Instances for Cats Typeclasses for Java 8 Time"
-    link: "https://github.com/ChristopherDavenport/cats-time"
 ---

collections/_projects/shapeless.md

@@ -5,14 +5,4 @@ description: "Shapeless is a generic programming library. Starting with implemen
 github: "https://github.com/milessabin/shapeless"
 affiliate: true
 core: true
-extensions:
-  - title: "argonaut-shapeless"
-    description: "Automatic derivation for argonaut"
-    link: "https://github.com/alexarchambault/argonaut-shapeless"
-  - title: "scalacheck-shapeless"
-    description: "Automatic derivation for ScalaCheck"
-    link: "https://github.com/alexarchambault/scalacheck-shapeless"
-  - title: "shapeless-contrib"
-    description: "Various bindings for third-party libraries"
-    link: "https://github.com/typelevel/shapeless-contrib"
 ---