remove unneeded includes statements

Author: vguerra

lib/Sema/TypeCheckAttr.cpp

@@ -34,10 +34,8 @@
 #include "swift/AST/PropertyWrappers.h"
 #include "swift/AST/SourceFile.h"
 #include "swift/AST/StorageImpl.h"
-#include "swift/AST/TypeAlignments.h"
 #include "swift/AST/TypeCheckRequests.h"
 #include "swift/AST/Types.h"
-#include "swift/Basic/SourceLoc.h"
 #include "swift/Parse/Lexer.h"
 #include "swift/Sema/IDETypeChecking.h"
 #include "clang/Basic/CharInfo.h"