diff --git a/pkgs/applications/science/math/geogebra/default.nix b/pkgs/applications/science/math/geogebra/default.nix
index a6950ad3451caf..a0548ffb232b3f 100644
--- a/pkgs/applications/science/math/geogebra/default.nix
+++ b/pkgs/applications/science/math/geogebra/default.nix
@@ -27,7 +27,7 @@ let
       calculus in one easy-to-use package.
     '';
     homepage = "https://www.geogebra.org/";
-    maintainers = with maintainers; [ ma27 ];
+    maintainers = with maintainers; [ ];
     license = with licenses; [ gpl3 cc-by-nc-sa-30 geogebra ];
     platforms = with platforms; linux ++ darwin;
     hydraPlatforms = [];
diff --git a/pkgs/applications/version-management/git-and-tools/delta/default.nix b/pkgs/applications/version-management/git-and-tools/delta/default.nix
index f44987037aab6f..e3862a81b42737 100644
--- a/pkgs/applications/version-management/git-and-tools/delta/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/delta/default.nix
@@ -34,6 +34,6 @@ rustPlatform.buildRustPackage rec {
     description = "A syntax-highlighting pager for git";
     changelog = "https://github.com/dandavison/delta/releases/tag/${version}";
     license = licenses.mit;
-    maintainers = with maintainers; [ marsam ma27 zowoq ];
+    maintainers = with maintainers; [ marsam zowoq ];
   };
 }
diff --git a/pkgs/applications/window-managers/yabar/build.nix b/pkgs/applications/window-managers/yabar/build.nix
index 10806ba78cfe6d..b9996e1b4666a5 100644
--- a/pkgs/applications/window-managers/yabar/build.nix
+++ b/pkgs/applications/window-managers/yabar/build.nix
@@ -50,6 +50,6 @@ stdenv.mkDerivation {
     homepage    = "https://github.com/geommer/yabar";
     license     = licenses.mit;
     platforms   = platforms.linux;
-    maintainers = with maintainers; [ ma27 ];
+    maintainers = with maintainers; [ ];
   };
 }
diff --git a/pkgs/development/python-modules/htmltreediff/default.nix b/pkgs/development/python-modules/htmltreediff/default.nix
deleted file mode 100644
index cd742606f8b967..00000000000000
--- a/pkgs/development/python-modules/htmltreediff/default.nix
+++ /dev/null
@@ -1,26 +0,0 @@
-{ buildPythonPackage, fetchFromGitHub, isPy3k, lxml, html5lib, nose, stdenv }:
-
-buildPythonPackage rec {
-  version = "0.1.2";
-  pname = "htmltreediff";
-
-  disabled = isPy3k;
-
-  src = fetchFromGitHub {
-    owner = "christian-oudard";
-    repo = pname;
-    rev = "v${version}";
-    sha256 = "16mqp2jyznrw1mgd3qzybq28h2k5wz7vmmz1m6xpgscazyjhvvd1";
-  };
-
-  propagatedBuildInputs = [ lxml html5lib ];
-
-  checkInputs = [ nose ];
-
-  meta = with stdenv.lib; {
-    description = " Structure-aware diff for html and xml documents";
-    homepage = "https://github.com/christian-oudard/htmltreediff";
-    license = licenses.bsdOriginal;
-    maintainers = with maintainers; [ ma27 ];
-  };
-}
diff --git a/pkgs/development/python-modules/pyaxmlparser/default.nix b/pkgs/development/python-modules/pyaxmlparser/default.nix
index 045cf19c8c0014..372d2feff15c6c 100644
--- a/pkgs/development/python-modules/pyaxmlparser/default.nix
+++ b/pkgs/development/python-modules/pyaxmlparser/default.nix
@@ -30,6 +30,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/appknox/pyaxmlparser";
     # Files from Androguard are licensed ASL 2.0
     license = with licenses; [ mit asl20 ];
-    maintainers = with maintainers; [ ma27 ];
+    maintainers = with maintainers; [ SuperSandro2000 ];
   };
 }
diff --git a/pkgs/development/python-modules/yowsup/default.nix b/pkgs/development/python-modules/yowsup/default.nix
index 0436fe8a0f00e8..c1f6b6632aab0c 100644
--- a/pkgs/development/python-modules/yowsup/default.nix
+++ b/pkgs/development/python-modules/yowsup/default.nix
@@ -30,6 +30,6 @@ buildPythonPackage rec {
     homepage = "https://github.com/tgalal/yowsup";
     description = "The python WhatsApp library";
     license = licenses.gpl3;
-    maintainers = with maintainers; [ ma27 ];
+    maintainers = with maintainers; [ SuperSandro2000 ];
   };
 }
diff --git a/pkgs/tools/admin/chkcrontab/default.nix b/pkgs/tools/admin/chkcrontab/default.nix
index 0740b0c1be6060..73076b65c58712 100644
--- a/pkgs/tools/admin/chkcrontab/default.nix
+++ b/pkgs/tools/admin/chkcrontab/default.nix
@@ -14,7 +14,7 @@ buildPythonApplication rec {
   meta = with stdenv.lib; {
     description = "A tool to detect crontab errors";
     license = licenses.asl20;
-    maintainers = with maintainers; [ ma27 ];
+    maintainers = with maintainers; [ SuperSandro2000 ];
     homepage = "https://github.com/lyda/chkcrontab";
   };
 }
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 57458230bb11cc..eac21e0da19b22 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2826,8 +2826,6 @@ in {
 
   html-sanitizer = callPackage ../development/python-modules/html-sanitizer { };
 
-  htmltreediff = callPackage ../development/python-modules/htmltreediff { };
-
   HTSeq = callPackage ../development/python-modules/HTSeq { };
 
   httmock = callPackage ../development/python-modules/httmock { };