Enable ARM optimizations for Opus in iOS

third_party/opus/opus_srcs_arm.gypi

Index: third_party/opus/opus_srcs_arm.gypi
diff --git a/third_party/opus/opus_srcs_arm.gypi b/third_party/opus/opus_srcs_arm.gypi
index 9727d36d0d54600b806eb0db6ec791269625a2d8..79e1cb0ee7ce5ed97810e169d2e0fa80e093bb25 100644
--- a/third_party/opus/opus_srcs_arm.gypi
+++ b/third_party/opus/opus_srcs_arm.gypi
@@ -4,9 +4,6 @@
 
 {
   'sources': [
-    'src/celt/arm/arm_celt_map.c',
-    'src/celt/arm/armcpu.c',
-    'src/celt/arm/armcpu.h',
     'src/celt/arm/fixed_armv4.h',
     'src/celt/arm/fixed_armv5e.h',
     'src/celt/arm/kiss_fft_armv4.h',
@@ -16,24 +13,5 @@
     'src/silk/arm/macro_armv5e.h',
     'src/silk/arm/SigProc_FIX_armv4.h',
     'src/silk/arm/SigProc_FIX_armv5e.h',
-    '<(INTERMEDIATE_DIR)/celt_pitch_xcorr_arm_gnu.S',
-  ],
-  'actions': [
-    {
-      'action_name': 'convert_assembler',
-      'inputs': [
-        'src/celt/arm/arm2gnu.pl',
-        'src/celt/arm/celt_pitch_xcorr_arm.s',
-      ],
-      'outputs': [
-        '<(INTERMEDIATE_DIR)/celt_pitch_xcorr_arm_gnu.S',
-      ],
-      'action': [
-        'bash',
-        '-c',
-        'perl src/celt/arm/arm2gnu.pl src/celt/arm/celt_pitch_xcorr_arm.s | sed "s/OPUS_ARM_MAY_HAVE_[A-Z]*/1/g" | sed "/.include/d" > <(INTERMEDIATE_DIR)/celt_pitch_xcorr_arm_gnu.S',
-      ],
-      'message': 'Convert Opus assembler for ARM.'
-    },
   ],
 }