Fix naming of basic_format_specs members

test/format-impl-test.cc

@@ -103,7 +103,6 @@ TEST(FPTest, GetCachedPower) {
 }
 
 TEST(FPTest, Grisu2FormatCompilesWithNonIEEEDouble) {
-  size_t size = 0;
   fmt::memory_buffer buf;
   grisu2_format(4.2f, buf, fmt::core_format_specs());
 }