Delete matrix-bot and move the client to the top level

Author: TristanCacqueray

matrix-client/CHANGELOG.md renamed to CHANGELOG.md

@@ -20,10 +20,7 @@
             myHaskellPackages = prev.haskellPackages.override {
               overrides = hpFinal: hpPrev: {
                 base64 = hpPrev.base64_1_0;
-                matrix-client =
-                  hpPrev.callCabal2nix "matrix-client" ./matrix-client/. { };
-                matrix-bot =
-                  hpPrev.callCabal2nix "matrix-bot" ./matrix-bot/. { };
+                matrix-client = hpPrev.callCabal2nix "matrix-client" ./. { };
               };
             };
           })