Revert "[common] Provide drake_export and opt-in to Werror=attributes (…

…RobotLocomotion#18677)"

This reverts commit 9fb09b4.

common/BUILD.bazel

@@ -30,7 +30,6 @@ drake_cc_package_library(
         ":diagnostic_policy",
         ":double",
         ":drake_bool",
-        ":drake_export",
         ":drake_path",
         ":dummy_value",
         ":essential",
@@ -191,11 +190,6 @@ drake_cc_library(
 
 # Miscellaneous utilities.
 
-drake_cc_library(
-    name = "drake_export",
-    hdrs = ["drake_export.h"],
-)
-
 drake_cc_library(
     name = "identifier",
     srcs = ["identifier.cc"],

geometry/BUILD.bazel

@@ -466,7 +466,6 @@ drake_cc_library(
         "//perception:point_cloud",
     ],
     deps = [
-        "//common:drake_export",
         "//common:find_resource",
         "//common:scope_exit",
         "//common:unused",

geometry/meshcat.cc

@@ -24,7 +24,6 @@
 #include <drake_vendor/uuid.h>
 #include <fmt/format.h>
 
-#include "drake/common/drake_export.h"
 #include "drake/common/drake_throw.h"
 #include "drake/common/find_resource.h"
 #include "drake/common/never_destroyed.h"
@@ -1089,8 +1088,10 @@ class Meshcat::Impl {
     });
   }
 
-  // This function is public via the PIMPL.
-  DRAKE_NO_EXPORT void SetAnimation(const MeshcatAnimation& animation) {
+  // This function is public via the PIMPL. We'll set linker visibility to
+  // avoid a warning about our std::visit's lambda capture of a msgpack object.
+  __attribute__((visibility("hidden")))
+  void SetAnimation(const MeshcatAnimation& animation) {
     DRAKE_DEMAND(IsThread(main_thread_id_));
 
     std::stringstream message_stream;

tools/skylark/drake_cc.bzl

@@ -7,7 +7,6 @@ load("//tools/skylark:kwargs.bzl", "incorporate_num_threads")
 # building with any compiler.
 CXX_FLAGS = [
     "-Werror=all",
-    "-Werror=attributes",
     "-Werror=cpp",
     "-Werror=deprecated",
     "-Werror=deprecated-declarations",