treewide: remove redundant rec

lib/systems/examples.nix

@@ -24,27 +24,27 @@ rec {
     platform = platforms.powernv;
   };
 
-  sheevaplug = rec {
+  sheevaplug = {
     config = "armv5tel-unknown-linux-gnueabi";
     platform = platforms.sheevaplug;
   };
 
-  raspberryPi = rec {
+  raspberryPi = {
     config = "armv6l-unknown-linux-gnueabihf";
     platform = platforms.raspberrypi;
   };
 
-  armv7l-hf-multiplatform = rec {
+  armv7l-hf-multiplatform = {
     config = "armv7l-unknown-linux-gnueabihf";
     platform = platforms.armv7l-hf-multiplatform;
   };
 
-  aarch64-multiplatform = rec {
+  aarch64-multiplatform = {
     config = "aarch64-unknown-linux-gnu";
     platform = platforms.aarch64-multiplatform;
   };
 
-  armv7a-android-prebuilt = rec {
+  armv7a-android-prebuilt = {
     config = "armv7a-unknown-linux-androideabi";
     sdkVer = "24";
     ndkVer = "18b";
@@ -52,7 +52,7 @@ rec {
     useAndroidPrebuilt = true;
   };
 
-  aarch64-android-prebuilt = rec {
+  aarch64-android-prebuilt = {
     config = "aarch64-unknown-linux-android";
     sdkVer = "24";
     ndkVer = "18b";
@@ -65,17 +65,17 @@ rec {
     inherit (platform.gcc) fpu;
   };
 
-  pogoplug4 = rec {
+  pogoplug4 = {
     config = "armv5tel-unknown-linux-gnueabi";
     platform = platforms.pogoplug4;
   };
 
-  ben-nanonote = rec {
+  ben-nanonote = {
     config = "mipsel-unknown-linux-uclibc";
     platform = platforms.ben_nanonote;
   };
 
-  fuloongminipc = rec {
+  fuloongminipc = {
     config = "mipsel-unknown-linux-gnu";
     platform = platforms.fuloong2f_n32;
   };