Remove use_xcode_clang=true from iOS packaging script.

Bug: webrtc:13197
Change-Id: I90a71cf1a1af9ba372cf9d23b73b9aeb3ea7b0b1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/232600
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35135}
diff --git a/tools_webrtc/ios/build_ios_libs.py b/tools_webrtc/ios/build_ios_libs.py
index 4318440..19ba499 100755
--- a/tools_webrtc/ios/build_ios_libs.py
+++ b/tools_webrtc/ios/build_ios_libs.py
@@ -159,8 +159,7 @@
                 use_bitcode, use_goma, extra_gn_args):
     gn_args = [
         'target_os="ios"', 'ios_enable_code_signing=false',
-        'use_xcode_clang=true', 'is_component_build=false',
-        'rtc_include_tests=false', 'use_lld=false',
+        'is_component_build=false', 'rtc_include_tests=false',
     ]
 
     # Add flavor option.