postgresql9{1,2}: remove, not supported anymore

See https://www.postgresql.org/support/versioning/.

-12
-12
pkgs/servers/sql/postgresql/default.nix
··· 91 92 in { 93 94 - postgresql91 = common { 95 - version = "9.1.24"; 96 - psqlSchema = "9.1"; 97 - sha256 = "1lz5ibvgz6cxprxlnd7a8iwv387idr7k53bdsvy4bw9ayglq83fy"; 98 - }; 99 - 100 - postgresql92 = common { 101 - version = "9.2.21"; 102 - psqlSchema = "9.2"; 103 - sha256 = "0697e843523ee60c563f987f9c65bc4201294b18525d6e5e4b2c50c6d4058ef9"; 104 - }; 105 - 106 postgresql93 = common { 107 version = "9.3.17"; 108 psqlSchema = "9.3";
··· 91 92 in { 93 94 postgresql93 = common { 95 version = "9.3.17"; 96 psqlSchema = "9.3";