[Parse] Remove TypeChecker and SIL options parameter from ParserUnit

Providing these is a bit of a layering violation,
the parser shouldn't care about these options (there
does seem to be one current use of `TypeCheckerOpts`
in the parser for designated operator types, but
that's a legacy feature that was never officially
supported).

tools/SourceKit/lib/SwiftLang/SwiftEditor.cpp

@@ -745,10 +745,9 @@ public:
 
     BufferID = SM.addNewSourceBuffer(std::move(BufCopy));
 
-    Parser.reset(new ParserUnit(
-        SM, SourceFileKind::Main, BufferID, CompInv.getLangOptions(),
-        CompInv.getTypeCheckerOptions(), CompInv.getSILOptions(),
-        CompInv.getModuleName()));
+    Parser.reset(new ParserUnit(SM, SourceFileKind::Main, BufferID,
+                                CompInv.getLangOptions(),
+                                CompInv.getModuleName()));
 
     registerTypeCheckerRequestFunctions(
         Parser->getParser().Context.evaluator);