gnuradioPackages.osmosdr: simplify expression for a single GR version

Remove unused swig3 dependency - was really needed only for GR 3.8 that
is now removed.

pkgs/development/gnuradio-modules/osmosdr/default.nix

@@ -13,7 +13,6 @@
 , thrift
 , fftwFloat
 , python
-, swig3
 , uhd
 , icu
 , airspy
@@ -24,26 +23,16 @@
 , gnuradioAtLeast
 }:
 
-let
-  version = {
-    "3.7" = "0.1.5";
-    "3.8" = "0.2.3";
-    "3.9" = "0.2.6";
-    "3.10" = "0.2.6";
-  }.${gnuradio.versionAttr.major};
+mkDerivation rec {
+  pname = "gr-osmosdr";
+  version = "0.2.6";
+
   src = fetchgit {
     url = "https://gitea.osmocom.org/sdr/gr-osmosdr";
     rev = "v${version}";
-    sha256 = {
-      "3.7" = "0bf9bnc1c3c4yqqqgmg3nhygj6rcfmyk6pybi27f7461d2cw1drv";
-      "3.8" = "sha256-ZfI8MshhZOdJ1U5FlnZKXsg2Rsvb6oKg943ZVYd/IWo=";
-      "3.9" = "sha256-jCUzBY1pYiEtcRQ97t9F6uEMVYw2NU0eoB5Xc2H6pGQ=";
-      "3.10" = "sha256-jCUzBY1pYiEtcRQ97t9F6uEMVYw2NU0eoB5Xc2H6pGQ=";
-    }.${gnuradio.versionAttr.major};
+    hash = "sha256-jCUzBY1pYiEtcRQ97t9F6uEMVYw2NU0eoB5Xc2H6pGQ=";
   };
-in mkDerivation {
-  pname = "gr-osmosdr";
-  inherit version src;
+
   disabled = gnuradioAtLeast "3.11";
 
   outputs = [ "out" "dev" ];
@@ -81,13 +70,8 @@ in mkDerivation {
   nativeBuildInputs = [
     cmake
     pkg-config
-    swig3
   ] ++ lib.optionals (gnuradio.hasFeature "python-support") [
-      (if (gnuradio.versionAttr.major == "3.7") then
-        python.pkgs.cheetah
-      else
-        python.pkgs.mako
-      )
+      python.pkgs.mako
       python
     ]
   ;