remove unused variables

src/dscanner/analysis/length_subtraction.d

@@ -40,7 +40,6 @@ final class LengthSubtractionCheck : BaseAnalyzer
 			if (l.identifierOrTemplateInstance is null
 					|| l.identifierOrTemplateInstance.identifier.text != "length")
 				goto end;
-			const(Token) token = l.identifierOrTemplateInstance.identifier;
 			addErrorMessage(addExpression, "dscanner.suspicious.length_subtraction",
 					"Avoid subtracting from '.length' as it may be unsigned.");
 		}

src/dscanner/utils.d

@@ -73,7 +73,7 @@ ubyte[] readFile(string fileName)
 		stderr.writefln("%s does not exist", fileName);
 		return [];
 	}
-	File f = File(fileName);
+
 	ubyte[] sourceCode;
 	sourceCode = cast(ubyte[]) fileName.read();
 	sourceCode.processBOM(fileName);