maintainers: drop ehmry

This user is blocked since May 2025, thus can't maintain any packages
anymore.

nixos/tests/ccache.nix

@@ -2,9 +2,6 @@ import ./make-test-python.nix (
   { pkgs, ... }:
   {
     name = "ccache";
-    meta = with pkgs.lib.maintainers; {
-      maintainers = [ ehmry ];
-    };
 
     nodes.machine =
       { ... }:

nixos/tests/cjdns.nix

@@ -21,9 +21,6 @@ in
 { pkgs, ... }:
 {
   name = "cjdns";
-  meta = with pkgs.lib.maintainers; {
-    maintainers = [ ehmry ];
-  };
 
   nodes = {
     # Alice finds peers over over ETHInterface.

nixos/tests/eris-server.nix

@@ -1,7 +1,6 @@
 { pkgs, lib, ... }:
 {
   name = "eris-server";
-  meta.maintainers = with lib.maintainers; [ ehmry ];
 
   nodes.server = {
     environment.systemPackages = [

nixos/tests/molly-brown.nix

@@ -6,9 +6,6 @@ in
 {
 
   name = "molly-brown";
-  meta = with pkgs.lib.maintainers; {
-    maintainers = [ ehmry ];
-  };
 
   nodes = {
 

nixos/tests/rsyncd.nix

@@ -1,7 +1,6 @@
 { pkgs, ... }:
 {
   name = "rsyncd";
-  meta.maintainers = with pkgs.lib.maintainers; [ ehmry ];
 
   nodes =
     let