Remove the GitLab runner related code

tests/default.nix

@@ -7,9 +7,6 @@
 # - intern.nixpkgs_20.03
 # - intern.nixpkgs_unstable
 
-# Modify pkgs to run the tests on non KVM machines
-{ noKVM ? false }: 
-
 with builtins;
 
 let
@@ -25,15 +22,10 @@ let
   genTest = testName: release:
   let
     pkgs = releases."${release}";
-    noKVMPkgs = p: if noKVM
-      then import ./lib/pkgs.nokvm.nix { pkgs = p; }
-      else p;
     test = pkgs.callPackage (./. + "/${testName}.nix") { };
   in {
     "name"= builtins.replaceStrings ["." "-"] ["_" "_"] release;
-    "value"= test {
-      pkgs = (noKVMPkgs pkgs);
-    };
+    "value"= test { inherit pkgs; };
   };
 
   releaseNames = [

tests/lib/config.nix

@@ -1,11 +1,3 @@
 {
     security.dhparams.defaultBitSize = 1024; # minimum size required by dovecot
-
-    # For slow non-kvm tests.
-    # nixos/modules/testing/test-instrumentation.nix also sets this. I don't know if there's a better way than etc to override theirs.
-    environment.etc."systemd/system.conf.d/bigdefaulttimeout.conf".text = ''
-      [Manager]
-      # Allow extremely slow start (default for test-VMs is 5 minutes)
-      DefaultTimeoutStartSec=15min
-    '';
 }

tests/lib/pkgs.nokvm.nix

@@ -1,32 +0,0 @@
-{ pkgs }:
-
-let
-    patchedMachinePM = pkgs.writeTextFile {
-        name = "Machine.pm.patched-to-wait-longer-for-vm";
-        text = builtins.replaceStrings ["alarm 600;"] ["alarm 1200;"] (builtins.readFile (<nixpkgs>+"/nixos/lib/test-driver/Machine.pm"));
-    };
-in
-(pkgs // {
-    qemu_test = with pkgs; stdenv.mkDerivation {
-        name = "qemu_test_no_kvm";
-        buildInputs = [ coreutils qemu_test ];
-        inherit qemu_test;
-        inherit coreutils;
-        builder = builtins.toFile "builder.sh" ''
-            PATH=$coreutils/bin:$PATH
-            mkdir -p $out/bin
-            cp $qemu_test/bin/* $out/bin/
-            ln -sf $out/bin/qemu-system-${stdenv.hostPlatform.qemuArch} $out/bin/qemu-kvm
-        '';
-    };
-    stdenv = pkgs.stdenv // {
-        mkDerivation = args: (pkgs.stdenv.mkDerivation (args // (
-            pkgs.lib.optionalAttrs (args.name == "nixos-test-driver") {
-                installPhase = args.installPhase + ''
-                    rm $libDir/Machine.pm
-                    cp ${patchedMachinePM} $libDir/Machine.pm
-                '';
-            }
-        )));
-    };
-})