treewide: remove redundant quotes

pkgs/tools/system/clinfo/default.nix

@@ -7,7 +7,7 @@ stdenv.mkDerivation rec {
     src = fetchFromGitHub {
       owner = "Oblomov";
       repo = "clinfo";
-      rev = "${version}";
+      rev = version;
       sha256 = "0y2q0lz5yzxy970b7w7340vp4fl25vndahsyvvrywcrn51ipgplx";
     };
 

pkgs/tools/system/hwinfo/default.nix

@@ -7,7 +7,7 @@ stdenv.mkDerivation rec {
   src = fetchFromGitHub {
     owner = "opensuse";
     repo = "hwinfo";
-    rev = "${version}";
+    rev = version;
     sha256 = "1fvlrqx1wgl79a9j3xhhhdihj4lkpbrchfsc27il0p52fynn4dji";
   };
 

pkgs/tools/system/lshw/default.nix

@@ -6,7 +6,7 @@ let numVersion = "02.18"; # :(
 in
 stdenv.mkDerivation rec {
   name = "lshw-${numVersion}b";
-  version = "${numVersion}";
+  version = numVersion;
 
   src = fetchurl {
     url = "https://ezix.org/software/files/lshw-B.${version}.tar.gz";

pkgs/tools/system/ps_mem/default.nix

@@ -8,7 +8,7 @@ in pythonPackages.buildPythonApplication {
 
   src = fetchFromGitHub {
     owner = "pixelb";
-    repo = "${pname}";
+    repo = pname;
     rev = "v${version}";
     sha256 = "0kcxlmfisbwf24p2k72njfyfp22fjr9p9zalg9b4w0yhnlzk24ph";
   };

pkgs/tools/system/vboot_reference/default.nix

@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
 
   src = fetchgit {
     url = https://chromium.googlesource.com/chromiumos/platform/vboot_reference;
-    rev = "${checkout}";
+    rev = checkout;
     sha256 = "1zja4ma6flch08h5j2l1hqnxmw2xwylidnddxxd5y2x05dai9ddj";
   };