Remove an unnecessary ABSL_ATTRIBUTE_UNUSED from a logging macro

PiperOrigin-RevId: 623158262
Change-Id: If6a29faa89f893747de22a3b02bd69573b5af15f

Author: derekmauro

absl/log/internal/check_op.h

@@ -58,13 +58,12 @@
 #endif
 
 #define ABSL_LOG_INTERNAL_CHECK_OP(name, op, val1, val1_text, val2, val2_text) \
-  while (                                                                      \
-      ::std::string* absl_log_internal_check_op_result ABSL_ATTRIBUTE_UNUSED = \
-          ::absl::log_internal::name##Impl(                                    \
-              ::absl::log_internal::GetReferenceableValue(val1),               \
-              ::absl::log_internal::GetReferenceableValue(val2),               \
-              ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(val1_text                 \
-                                                     " " #op " " val2_text)))  \
+  while (::std::string* absl_log_internal_check_op_result =                    \
+             ::absl::log_internal::name##Impl(                                 \
+                 ::absl::log_internal::GetReferenceableValue(val1),            \
+                 ::absl::log_internal::GetReferenceableValue(val2),            \
+                 ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(                       \
+                     val1_text " " #op " " val2_text)))                        \
     ABSL_LOG_INTERNAL_CONDITION_FATAL(STATELESS, true)                         \
   ABSL_LOG_INTERNAL_CHECK(*absl_log_internal_check_op_result).InternalStream()
 #define ABSL_LOG_INTERNAL_QCHECK_OP(name, op, val1, val1_text, val2, \