fix mautrix-signal/whatsapp logging and remove old secrets

modules/services/server/matrix.nix

@@ -17,10 +17,6 @@ let
     return 200 '${builtins.toJSON data}';
   '';
 in {
-  environment.systemPackages = [
-    pkgs.mautrix-whatsapp
-  ];
-
   services.nginx = {
     enable = true;
     recommendedTlsSettings = true;
@@ -212,11 +208,13 @@ in {
                   };
               };
               logging = {
-	          min-level = "warn";
-		  writers = {
+	          min_level = "warn";
+		  writers = [
+		    {
 		      format = "pretty-colored";
 		      type = "stdout";
-		  };
+		    }
+		  ];
               };
           };
       };
@@ -260,11 +258,13 @@ in {
                   };
               };
               logging = {
-	          min-level = "warn";
-		  writers = {
+	          min_level = "warn";
+		  writers = [
+		    {
 		      format = "pretty-colored";
 		      type = "stdout";
-		  };
+		    }
+		  ];
               };
           };
       };