[SR-14453] Removed unused flags in FrontendOptions.

The equivalents of the `DebugTimeFunctionBodies` and `DebugTimeExpressionTypeChecking` are present and used in `TypeCheckerOptions`.

Author: jirid

include/swift/Frontend/FrontendOptions.h

@@ -182,12 +182,6 @@ class FrontendOptions {
   /// the module.
   bool CheckOnoneSupportCompleteness = false;
 
-  /// If set, dumps wall time taken to check each function body to llvm::errs().
-  bool DebugTimeFunctionBodies = false;
-
-  /// If set, dumps wall time taken to check each expression.
-  bool DebugTimeExpressionTypeChecking = false;
-
   /// The path to which we should output statistics files.
   std::string StatsOutputDir;