chore: rm fix_export_zlib_symbols.patch in favor of gn argument

build/args/all.gn

@@ -75,3 +75,6 @@ enable_linux_installer = false
 
 # Disable "Save to Drive" feature in PDF viewer
 enable_pdf_save_to_drive = false
+
+# Export zlib symbols for native modules
+zlib_symbols_visible = true

patches/chromium/.patches

@@ -53,7 +53,6 @@ worker_feat_add_hook_to_notify_script_ready.patch
 chore_provide_iswebcontentscreationoverridden_with_full_params.patch
 fix_properly_honor_printing_page_ranges.patch
 export_gin_v8platform_pageallocator_for_usage_outside_of_the_gin.patch
-fix_export_zlib_symbols.patch
 web_contents.patch
 webview_fullscreen.patch
 extend_apply_webpreferences.patch

patches/chromium/fix_export_zlib_symbols.patch

@@ -1,22 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Shelley Vohr <shelley.vohr@gmail.com>
-Date: Mon, 1 Jun 2020 15:30:47 -0800
-Subject: fix: export zlib symbols
-
-This patch sets ZLIB_DLL so that we properly export zlib symbols.
-
-diff --git a/third_party/zlib/BUILD.gn b/third_party/zlib/BUILD.gn
-index afd3e8cc0f38e95b3b04835b46bd1197a63b4ed1..652fa32d49de9f0c73777c0d4d99421f52e16b38 100644
---- a/third_party/zlib/BUILD.gn
-+++ b/third_party/zlib/BUILD.gn
-@@ -333,6 +333,10 @@ component("zlib") {
-   defines = []
-   deps = []
- 
-+  if (is_win) {
-+    defines += [ "ZLIB_DLL" ]
-+  }
-+
-   if (!use_x86_x64_optimizations && !use_arm_neon_optimizations) {
-     # Apparently android_cronet bot builds with NEON disabled and
-     # we also should disable optimizations for iOS@x86 (a.k.a. simulator).