configuration.nix: tweak system packages

.config/configuration.nix

@@ -308,7 +308,7 @@ in
     p7zip
     iotop
     img2pdf
-    pdftk
+    #pdftk
     exa
     fd
     zoxide
@@ -321,7 +321,7 @@ in
     #geckodriver
     #python2-with-my-packages
     python3-with-my-packages
-    jdk8
+    #jdk8
     #visualvm
     rustup
     cargo-outdated cargo-edit
@@ -330,8 +330,8 @@ in
     jetbrains.idea-ultimate
     #androidStudioPackages.stable
     #nodejs
-    gcc10 gnumake cmake
-    llvmPackages_11.bintools
+    #gcc10 gnumake cmake
+    #llvmPackages_11.bintools
 
     # cplex
     key
@@ -341,7 +341,7 @@ in
     droidcam
     sqlite
     borgbackup
-    nix-tree rnix-hashes
+    nix-tree rnix-hashes nixpkgs-review
     #gallery-dl
     yt-dlp
     #plantuml
@@ -369,7 +369,8 @@ in
     qbittorrent
     tdesktop
     alacritty
-    okular akregator kwalletmanager gwenview ark kcalc kcolorchooser kompare k3b kcharselect kmag
+    kwalletmanager
+    okular akregator gwenview ark kcalc kcolorchooser kompare k3b kcharselect kmag
     plasma5Packages.kruler
     kdeconnect
     plasma-vault