[Parse] Remove _Nonnull

_Nonnull is not a thing in Windows `cl.exe`. Since it's not needed in
C++, just remove it.

Author: rintaro

lib/Parse/Lexer.cpp

@@ -32,9 +32,8 @@
 #include <limits>
 
 extern "C" bool
-swift_ASTGen_lexRegexLiteral(const char *_Nonnull *_Nonnull curPtrPtr,
-                             const char *_Nonnull bufferEndPtr,
-                             bool mustBeRegex, void *_Nullable diagEngine);
+swift_ASTGen_lexRegexLiteral(const char ** curPtrPtr, const char * bufferEndPtr,
+                             bool mustBeRegex, void * diagEngine);
 
 using namespace swift;
 

lib/Parse/ParseRegex.cpp

@@ -19,9 +19,9 @@
 #include "swift/Parse/Parser.h"
 
 extern "C" bool swift_ASTGen_parseRegexLiteral(
-    BridgedString input, size_t *_Nonnull versionOut,
-    void *_Nonnull UnsafeMutableRawPointer, size_t captureStructureSize,
-    BridgedSourceLoc diagLoc, void *_Nonnull diagEngine);
+    BridgedString input, size_t * versionOut,
+    void * UnsafeMutableRawPointer, size_t captureStructureSize,
+    BridgedSourceLoc diagLoc, void * diagEngine);
 
 using namespace swift;