pkgs/top-level: remove unused let bindings

Generated using deadnix; split from #514611.

pkgs/top-level/haxe-packages.nix

@@ -12,14 +12,6 @@
 let
   withCommas = lib.replaceStrings [ "." ] [ "," ];
 
-  # simulate "haxelib dev $libname ."
-  simulateHaxelibDev = libname: ''
-    devrepo=$(mktemp -d)
-    mkdir -p "$devrepo/${withCommas libname}"
-    echo $(pwd) > "$devrepo/${withCommas libname}/.dev"
-    export HAXELIB_PATH="$HAXELIB_PATH:$devrepo"
-  '';
-
   installLibHaxe =
     {
       libname,

pkgs/top-level/linux-kernels.nix

@@ -27,20 +27,6 @@ let
     vanillaPackages
     rpiPackages
     ;
-
-  markBroken =
-    drv:
-    drv.overrideAttrs (
-      {
-        meta ? { },
-        ...
-      }:
-      {
-        meta = meta // {
-          broken = true;
-        };
-      }
-    );
 in
 {
   kernelPatches = callPackage ../os-specific/linux/kernel/patches.nix { };

pkgs/top-level/perl-packages.nix

@@ -28,7 +28,7 @@ self:
 # cpan2nix assumes that perl-packages.nix will be used only with perl 5.30.3 or above
 assert lib.versionAtLeast perl.version "5.30.3";
 let
-  inherit (lib) maintainers teams;
+  inherit (lib) maintainers;
 
 in
 with self;

pkgs/top-level/release-cross.nix

@@ -47,7 +47,6 @@ let
     linux
     mapTestOnCross
     pkgsForCross
-    unix
     ;
 
   inherit (release-lib.lib)

pkgs/top-level/release-lib.nix

@@ -20,7 +20,6 @@ let
   inherit (lib)
     addMetaAttrs
     any
-    derivations
     filter
     flip
     genAttrs
@@ -28,8 +27,6 @@ let
     hydraJob
     id
     isDerivation
-    lists
-    maintainers
     mapAttrs
     mapAttrs'
     mapAttrsRecursive

pkgs/top-level/release.nix

@@ -86,7 +86,6 @@ let
     id
     isDerivation
     optionals
-    recursiveUpdate
     ;
 
   inherit (release-lib.lib.attrsets) unionOfDisjoint;

pkgs/top-level/variants.nix

@@ -11,16 +11,6 @@
   nixpkgsFun,
   overlays,
 }:
-let
-  makeLLVMParsedPlatform =
-    parsed:
-    (
-      parsed
-      // {
-        abi = lib.systems.parse.abis.llvm;
-      }
-    );
-in
 self: super: {
   pkgsLLVM = nixpkgsFun {
     overlays = [