grpc: fixup build on darwin after update

This patch wouldn't apply since 8eed68037,
but apparently it's not needed anymore.

pkgs/by-name/gr/grpc/dynamic-lookup-darwin.patch

@@ -1,11 +0,0 @@
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 053b9e3784..0979b504da 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -38083,3 +38083,6 @@ generate_pkgconfig(
-   "-lgrpcpp_otel_plugin"
-   "-laddress_sorting -lupb_textformat_lib -lupb_json_lib -lupb_wire_lib -lupb_message_lib -lutf8_range_lib -lupb_mini_descriptor_lib -lupb_mem_lib -lupb_base_lib"
-   "grpcpp_otel_plugin.pc")
-+
-+target_link_options(upb_textformat_lib PRIVATE -Wl,-undefined,dynamic_lookup)
-+target_link_options(upb_json_lib PRIVATE -Wl,-undefined,dynamic_lookup)

pkgs/by-name/gr/grpc/package.nix

@@ -49,10 +49,6 @@ stdenv.mkDerivation (finalAttrs: {
       url = "https://github.com/lopsided98/grpc/commit/a9b917666234f5665c347123d699055d8c2537b2.patch";
       hash = "sha256-Lm0GQsz/UjBbXXEE14lT0dcRzVmCKycrlrdBJj+KLu8=";
     })
-  ]
-  ++ lib.optionals stdenv.hostPlatform.isDarwin [
-    # fix build of 1.63.0 and newer on darwin: https://github.com/grpc/grpc/issues/36654
-    ./dynamic-lookup-darwin.patch
   ];
 
   nativeBuildInputs = [