postgresql_9_5: drop

PostgreSQL 9.5 has reached EOL on February 11, 2021.
See https://www.postgresql.org/support/versioning/

nixos/doc/manual/release-notes/rl-2105.xml

@@ -948,6 +948,11 @@ environment.systemPackages = [
      <link linkend="opt-boot.extraSystemdUnitPaths">boot.extraSystemdUnitPaths</link> list.
     </para>
    </listitem>
+   <listitem>
+    <para>
+     PostgreSQL 9.5 is scheduled EOL during the 21.05 life cycle and has been removed.
+    </para>
+   </listitem>
   </itemizedlist>
  </section>
 </section>

nixos/modules/services/databases/postgresql.nix

@@ -295,8 +295,7 @@ in
       # systems!
       mkDefault (if versionAtLeast config.system.stateVersion "20.03" then pkgs.postgresql_11
             else if versionAtLeast config.system.stateVersion "17.09" then pkgs.postgresql_9_6
-            else if versionAtLeast config.system.stateVersion "16.03" then pkgs.postgresql_9_5
-            else throw "postgresql_9_4 was removed, please upgrade your postgresql version.");
+            else throw "postgresql_9_5 was removed, please upgrade your postgresql version.");
 
     services.postgresql.dataDir = mkDefault "/var/lib/postgresql/${cfg.package.psqlSchema}";
 

pkgs/servers/sql/postgresql/default.nix

@@ -191,15 +191,6 @@ let
 
 in self: {
 
-  postgresql_9_5 = self.callPackage generic {
-    version = "9.5.25";
-    psqlSchema = "9.5";
-    sha256 = "00yny0sskxrqk4ji2phgv3iqxd1aiy6rh660k73s4s1pn9gcaa3n";
-    this = self.postgresql_9_5;
-    thisAttr = "postgresql_9_5";
-    inherit self;
-  };
-
   postgresql_9_6 = self.callPackage generic {
     version = "9.6.21";
     psqlSchema = "9.6";

pkgs/top-level/aliases.nix

@@ -552,7 +552,6 @@ mapAliases ({
   pmtools = acpica-tools; # added 2018-11-01
   polarssl = mbedtls; # added 2018-04-25
   poppler_qt5 = libsForQt5.poppler;  # added 2015-12-19
-  postgresql95 = postgresql_9_5;
   postgresql96 = postgresql_9_6;
   postgresql100 = throw "postgresql100 was deprecated on 2018-10-21: use postgresql_10 instead";
   # postgresql plugins

pkgs/top-level/all-packages.nix

@@ -18931,7 +18931,6 @@ in
   timescaledb-tune = callPackage ../development/tools/database/timescaledb-tune { };
 
   inherit (import ../servers/sql/postgresql pkgs)
-    postgresql_9_5
     postgresql_9_6
     postgresql_10
     postgresql_11