delete spurious newline

Author: akuhlens

flang/include/flang/Support/Fortran-features.h

@@ -151,6 +151,5 @@ class LanguageFeatureControl {
   bool warnAllUsage_{false};
   bool disableAllWarnings_{false};
 };
-
 } // namespace Fortran::common
 #endif // FORTRAN_SUPPORT_FORTRAN_FEATURES_H_