Remove use of ATOMIC_VAR_INIT.

This macro does nothing and results in deprecated warnings.

Test: Unit tests pass.
Change-Id: I9d9f68a9047a0a51cd68b15cb7bc13e6a878a4b9
diff --git a/tests/stdatomic_test.cpp b/tests/stdatomic_test.cpp
index f5c6bb1..1c51b11 100644
--- a/tests/stdatomic_test.cpp
+++ b/tests/stdatomic_test.cpp
@@ -37,7 +37,7 @@
 }
 
 TEST(stdatomic, init) {
-  atomic_int v = ATOMIC_VAR_INIT(123);
+  atomic_int v = 123;
   ASSERT_EQ(123, atomic_load(&v));
 
   atomic_init(&v, 456);
@@ -145,35 +145,35 @@
 }
 
 TEST(stdatomic, atomic_fetch_add) {
-  atomic_int i = ATOMIC_VAR_INIT(123);
+  atomic_int i = 123;
   ASSERT_EQ(123, atomic_fetch_add(&i, 1));
   ASSERT_EQ(124, atomic_fetch_add_explicit(&i, 1, memory_order_relaxed));
   ASSERT_EQ(125, atomic_load(&i));
 }
 
 TEST(stdatomic, atomic_fetch_sub) {
-  atomic_int i = ATOMIC_VAR_INIT(123);
+  atomic_int i = 123;
   ASSERT_EQ(123, atomic_fetch_sub(&i, 1));
   ASSERT_EQ(122, atomic_fetch_sub_explicit(&i, 1, memory_order_relaxed));
   ASSERT_EQ(121, atomic_load(&i));
 }
 
 TEST(stdatomic, atomic_fetch_or) {
-  atomic_int i = ATOMIC_VAR_INIT(0x100);
+  atomic_int i = 0x100;
   ASSERT_EQ(0x100, atomic_fetch_or(&i, 0x020));
   ASSERT_EQ(0x120, atomic_fetch_or_explicit(&i, 0x003, memory_order_relaxed));
   ASSERT_EQ(0x123, atomic_load(&i));
 }
 
 TEST(stdatomic, atomic_fetch_xor) {
-  atomic_int i = ATOMIC_VAR_INIT(0x100);
+  atomic_int i = 0x100;
   ASSERT_EQ(0x100, atomic_fetch_xor(&i, 0x120));
   ASSERT_EQ(0x020, atomic_fetch_xor_explicit(&i, 0x103, memory_order_relaxed));
   ASSERT_EQ(0x123, atomic_load(&i));
 }
 
 TEST(stdatomic, atomic_fetch_and) {
-  atomic_int i = ATOMIC_VAR_INIT(0x123);
+  atomic_int i = 0x123;
   ASSERT_EQ(0x123, atomic_fetch_and(&i, 0x00f));
   ASSERT_EQ(0x003, atomic_fetch_and_explicit(&i, 0x2, memory_order_relaxed));
   ASSERT_EQ(0x002, atomic_load(&i));