galculator: migrate to by-name

pkgs/by-name/ga/galculator/package.nix

@@ -1,6 +1,6 @@
 { lib, stdenv, fetchFromGitHub, fetchpatch
 , autoreconfHook, intltool
-, gtk, pkg-config, flex }:
+, gtk3, pkg-config, flex }:
 
 stdenv.mkDerivation rec {
   pname = "galculator";
@@ -24,12 +24,12 @@ stdenv.mkDerivation rec {
   ];
 
   nativeBuildInputs = [ autoreconfHook intltool pkg-config ];
-  buildInputs = [ gtk flex ];
+  buildInputs = [ gtk3 flex ];
 
   meta = with lib; {
-    description = "GTK 2/3 algebraic and RPN calculator";
+    description = "GTK algebraic and RPN calculator";
     longDescription = ''
-      galculator is a GTK 2 / GTK 3 based calculator. Its main features include:
+      galculator is a GTK-based calculator. Its main features include:
 
       - Algebraic, RPN (Reverse Polish Notation), Formula Entry and Paper modes;
       - Basic and Scientific Modes

pkgs/top-level/all-packages.nix

@@ -7836,10 +7836,6 @@ with pkgs;
 
   uniscribe = callPackage ../tools/text/uniscribe { };
 
-  galculator = callPackage ../applications/misc/galculator {
-    gtk = gtk3;
-  };
-
   fornalder = callPackage ../applications/version-management/fornalder { };
 
   galen = callPackage ../development/tools/galen { };