flake: remove apps to reduce complexity

As pointed out here numtide/flake-utils#17, apps are somewhat redundant
and, for the sake of simplicity, should be removed for now.

flake.nix

@@ -61,6 +61,7 @@
           defaultTemplate = self.templates.flk;
         };
     in
+    recursiveUpdate
       (eachDefaultSystem
         (system:
           let
@@ -70,15 +71,10 @@
               overlays = [ devshell.overlay ];
             };
 
-          packages = filterAttrs
+            packages = flattenTreeSystem system
-            (_: drv: drv.meta.broken != true)
-            (flattenTreeSystem system
               (genPackages {
                 inherit self pkgs;
-              })
+              });
-            );
-
-
           in
           {
             inherit packages;
@@ -86,24 +82,8 @@
             devShell = import ./shell.nix {
               inherit pkgs;
             };
-
+          }
-          apps =
-            let
-              validApps = attrNames (filterAttrs
-                (_: drv:
-                  drv.meta.broken != true
-                  && pathExists "${drv}/bin"
         )
-                self.packages."${osSystem}"
+      )
-              );
+      outputs;
-
-              validSystems = attrNames packages;
-
-              filterBins = filterAttrs
-                (n: _: elem n validSystems && elem n validApps)
-                packages;
-            in
-            mapAttrs (_: drv: mkApp { inherit drv; }) filterBins;
-
-        })) // outputs;
 }