remove more needless String conversions

src/client/result/ResultParser.rs

@@ -300,9 +300,7 @@ pub fn urlDecode(encoded: &str) -> Result<String, Exceptions> {
     if let Ok(decoded) = decode(encoded) {
         Ok(decoded.to_string())
     } else {
-        Err(Exceptions::illegalState(String::from(
-            "UnsupportedEncodingException",
-        )))
+        Err(Exceptions::illegalState("UnsupportedEncodingException"))
     }
 }
 

src/client/result/VINResultParser.rs

@@ -124,9 +124,9 @@ fn model_year(c: char) -> Result<u32, Exceptions> {
         'V'..='Y' => Ok((c as u8 as u32 - b'V' as u32) + 1997),
         '1'..='9' => Ok((c as u8 as u32 - b'1' as u32) + 2001),
         'A'..='D' => Ok((c as u8 as u32 - b'A' as u32) + 2010),
-        _ => Err(Exceptions::illegalArgument(String::from(
+        _ => Err(Exceptions::illegalArgument(
             "model year argument out of range",
-        ))),
+        )),
     }
 }