Diff reduction: Remove Scope::ignoreTemplates and friends.

It is unused since my change to the way codegen is
driven. If we want to optimize template codegen again,
we should do it properly, contributing the changes back
to DMD.

dmd2/staticassert.c

@@ -55,7 +55,6 @@ void StaticAssert::semantic2(Scope *sc)
     ScopeDsymbol *sd = new ScopeDsymbol();
     sc = sc->push(sd);
     sc->flags |= SCOPEstaticassert;
-    ++sc->ignoreTemplates;
     Expression *e = exp->ctfeSemantic(sc);
     e = resolveProperties(sc, e);
     sc = sc->pop();