Remove unused field warnings in test-parse-unittests.

The fields `UID` and `int` are not used, however, they are part of the
file format and should not be removed.

Author: Alexhuszagh

lexical-parse-float/etc/correctness/test-parse-unittests/main.rs

@@ -16,6 +16,7 @@ struct StrtodTests {
     ConversionTests: Vec<ConversionTest>,
 }
 
+#[allow(dead_code)]
 #[derive(Debug, Deserialize)]
 struct FormattingTest {
     UID: String,
@@ -24,6 +25,7 @@ struct FormattingTest {
     int: String,
 }
 
+#[allow(dead_code)]
 #[derive(Debug, Deserialize)]
 struct ConversionTest {
     UID: String,