Also remove poly_rq_mul.S from generate_build_files.py

97873cd1a5 removed the HRSS assembly, but that file was special-cased in
generate_build_files.py and so an update is also needed there.

Change-Id: I3c99989da5faee6b39a3b90fee5fa89c20997c64
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/56345
Auto-Submit: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: Adam Langley <agl@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

util/generate_build_files.py

diff --git a/util/generate_build_files.py b/util/generate_build_files.py
index f778a28..5a19c92 100644
--- a/util/generate_build_files.py
+++ b/util/generate_build_files.py
@@ -47,9 +47,6 @@
         'src/crypto/curve25519/asm/x25519-asm-arm.S',
         'src/crypto/poly1305/poly1305_arm_asm.S',
     ],
-    ('linux', 'x86_64'): [
-        'src/crypto/hrss/asm/poly_rq_mul.S',
-    ],
 }
 
 PREFIX = None