3p/nixpkgs: remove libvirt patch, now upstream

third_party/nixpkgs/patches/various.patch

@@ -1,70 +1,3 @@
-diff --git a/nixos/modules/virtualisation/libvirtd.nix b/nixos/modules/virtualisation/libvirtd.nix
---- a/nixos/modules/virtualisation/libvirtd.nix
-+++ b/nixos/modules/virtualisation/libvirtd.nix
-@@ -46,6 +46,14 @@ in {
-       '';
-     };
- 
-+    package = mkOption {
-+      type = types.package;
-+      default = pkgs.libvirt;
-+      description = ''
-+        libvirt package to use.
-+      '';
-+    };
-+
-     qemuPackage = mkOption {
-       type = types.package;
-       default = pkgs.qemu;
-@@ -169,26 +177,26 @@ in {
-       source = "/run/${dirName}/nix-helpers/qemu-bridge-helper";
-     };
- 
--    systemd.packages = [ pkgs.libvirt ];
-+    systemd.packages = [ cfg.package ];
- 
-     systemd.services.libvirtd-config = {
-       description = "Libvirt Virtual Machine Management Daemon - configuration";
-       script = ''
-         # Copy default libvirt network config .xml files to /var/lib
-         # Files modified by the user will not be overwritten
--        for i in $(cd ${pkgs.libvirt}/var/lib && echo \
-+        for i in $(cd ${cfg.package}/var/lib && echo \
-             libvirt/qemu/networks/*.xml libvirt/qemu/networks/autostart/*.xml \
-             libvirt/nwfilter/*.xml );
-         do
-             mkdir -p /var/lib/$(dirname $i) -m 755
--            cp -npd ${pkgs.libvirt}/var/lib/$i /var/lib/$i
-+            cp -npd ${cfg.package}/var/lib/$i /var/lib/$i
-         done
- 
-         # Copy generated qemu config to libvirt directory
-         cp -f ${qemuConfigFile} /var/lib/${dirName}/qemu.conf
- 
-         # stable (not GC'able as in /nix/store) paths for using in <emulator> section of xml configs
--        for emulator in ${pkgs.libvirt}/libexec/libvirt_lxc ${cfg.qemuPackage}/bin/qemu-kvm ${cfg.qemuPackage}/bin/qemu-system-*; do
-+        for emulator in ${cfg.package}/libexec/libvirt_lxc ${cfg.qemuPackage}/bin/qemu-kvm ${cfg.qemuPackage}/bin/qemu-system-*; do
-           ln -s --force "$emulator" /run/${dirName}/nix-emulators/
-         done
- 
-@@ -249,7 +257,7 @@ in {
- 
-     systemd.services.virtlogd = {
-       description = "Virtual machine log manager";
--      serviceConfig.ExecStart = "@${pkgs.libvirt}/sbin/virtlogd virtlogd";
-+      serviceConfig.ExecStart = "@${cfg.package}/sbin/virtlogd virtlogd";
-       restartIfChanged = false;
-     };
- 
-@@ -261,7 +269,7 @@ in {
- 
-     systemd.services.virtlockd = {
-       description = "Virtual machine lock manager";
--      serviceConfig.ExecStart = "@${pkgs.libvirt}/sbin/virtlockd virtlockd";
-+      serviceConfig.ExecStart = "@${cfg.package}/sbin/virtlockd virtlockd";
-       restartIfChanged = false;
-     };
- 
 diff --git a/pkgs/build-support/build-bazel-package/default.nix b/pkgs/build-support/build-bazel-package/default.nix
 --- a/pkgs/build-support/build-bazel-package/default.nix
 +++ b/pkgs/build-support/build-bazel-package/default.nix