pw_rpc: Remove unnecessary dependency

Change-Id: Ie8f8337549d000202ad46a794ad9cde1a955d78d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/97444
Commit-Queue: Leo Arvan <leoarvan@google.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
diff --git a/pw_rpc/BUILD.gn b/pw_rpc/BUILD.gn
index be7ad09..ef39ec7 100644
--- a/pw_rpc/BUILD.gn
+++ b/pw_rpc/BUILD.gn
@@ -348,7 +348,6 @@
     "echo.options",
     "benchmark.options",
   ]
-  deps = [ "$dir_pw_protobuf:common_protos" ]
   python_package = "py"
   prefix = "pw_rpc"
 }