clickhouse: Drop unncessary version gate and patches

pkgs/by-name/cl/clickhouse/generic.nix

@@ -8,7 +8,6 @@
 {
   lib,
   stdenv,
-  llvmPackages_19,
   llvmPackages_21,
   fetchFromGitHub,
   fetchpatch,
@@ -32,7 +31,7 @@
   versionCheckHook,
 }:
 let
-  llvmPackages = if lib.versionAtLeast version "26" then llvmPackages_21 else llvmPackages_19;
+  llvmPackages = llvmPackages_21;
   llvmStdenv = llvmPackages.stdenv;
 in
 llvmStdenv.mkDerivation (finalAttrs: {
@@ -129,26 +128,6 @@ llvmStdenv.mkDerivation (finalAttrs: {
 
   dontCargoSetupPostUnpack = true;
 
-  patches =
-    lib.optional (lib.versions.majorMinor version == "25.8") (fetchpatch {
-      # Disable building WASM lexer
-      url = "https://github.com/ClickHouse/ClickHouse/commit/67a42b78cdf1c793e78c1adbcc34162f67044032.patch";
-      hash = "sha256-7VF+JSztqTWD+aunCS3UVNxlRdwHc2W5fNqzDyeo3Fc=";
-    })
-    ++
-
-      lib.optional (lib.versions.majorMinor version == "25.8" && stdenv.hostPlatform.isDarwin)
-        (fetchpatch {
-          # Do not intercept memalign on darwin
-          url = "https://github.com/ClickHouse/ClickHouse/commit/0cfd2dbe981727fb650f3b9935f5e7e7e843180f.patch";
-          hash = "sha256-1iNYZbugX2g2dxNR1ZiUthzPnhLUR8g118aG23yhgUo=";
-        })
-    ++ lib.optional (!lib.versionAtLeast version "25.11" && stdenv.hostPlatform.isDarwin) (fetchpatch {
-      # Remove flaky macOS SDK version detection
-      url = "https://github.com/ClickHouse/ClickHouse/commit/11e172a37bd0507d595d27007170090127273b33.patch";
-      hash = "sha256-oI7MrjMgJpIPTsci2IqEOs05dUGEMnjI/WqGp2N+rps=";
-    });
-
   postPatch = ''
     patchShebangs src/ utils/
   ''