Revert include of "clang/Basic/CharInfo.h" in Driver.cpp

Because `scanInputForCXX20ModuleUsage` has been moved out of
Driver.cpp, including "CharInfo.h" here is not required anymore.
(This also fixes formatting in one comment).

Author: naveen-seth

clang/include/clang/Lex/DependencyDirectivesScanner.h

@@ -140,7 +140,7 @@ void printDependencyDirectivesAsSource(
 ///
 /// \param Source The input source buffer.
 ///
-/// \returns true if any  C++20 named modules related directive was found.
+/// \returns true if any C++20 named modules related directive was found.
 bool scanInputForCXX20ModulesUsage(StringRef Source);
 
 /// Functor that returns the dependency directives for a given file.

clang/lib/Driver/Driver.cpp

@@ -52,7 +52,6 @@
 #include "ToolChains/WebAssembly.h"
 #include "ToolChains/XCore.h"
 #include "ToolChains/ZOS.h"
-#include "clang/Basic/CharInfo.h"
 #include "clang/Basic/DiagnosticDriver.h"
 #include "clang/Basic/TargetID.h"
 #include "clang/Basic/Version.h"