Remove OPENSSL_IA32_SSE2 checks in x86 perlasm

We always pass this, so checks are redundant. Note this doesn't control
the SSE2 runtime checks, just whether SSE2 code is emitted.

Change-Id: I159806928643915afecf738dcac218007ba94600
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/65869
Reviewed-by: Bob Beck <bbe@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

cmake/perlasm.cmake

diff --git a/cmake/perlasm.cmake b/cmake/perlasm.cmake
index 0dc104c..17a47b9 100644
--- a/cmake/perlasm.cmake
+++ b/cmake/perlasm.cmake
@@ -40,9 +40,9 @@
     add_perlasm_target("${dest}-linux.S" ${src} linux32 ${ARGN})
     append_to_parent_scope("${var}_ASM" "${dest}-linux.S")
   elseif(arch STREQUAL "x86")
-    add_perlasm_target("${dest}-apple.S" ${src} macosx -fPIC -DOPENSSL_IA32_SSE2 ${ARGN})
-    add_perlasm_target("${dest}-linux.S" ${src} elf -fPIC -DOPENSSL_IA32_SSE2 ${ARGN})
-    add_perlasm_target("${dest}-win.asm" ${src} win32n -DOPENSSL_IA32_SSE2 ${ARGN})
+    add_perlasm_target("${dest}-apple.S" ${src} macosx -fPIC ${ARGN})
+    add_perlasm_target("${dest}-linux.S" ${src} elf -fPIC ${ARGN})
+    add_perlasm_target("${dest}-win.asm" ${src} win32n ${ARGN})
     append_to_parent_scope("${var}_ASM" "${dest}-apple.S" "${dest}-linux.S")
     append_to_parent_scope("${var}_NASM" "${dest}-win.asm")
   elseif(arch STREQUAL "x86_64")