[nfc] Remove dead operator code pt. 3

Author: zoecarver

lib/ClangImporter/ImportDecl.cpp

@@ -8872,16 +8872,6 @@ bool importer::isSpecialUIKitStructZeroProperty(const clang::NamedDecl *decl) {
   return ident->isStr("UIEdgeInsetsZero") || ident->isStr("UIOffsetZero");
 }
 
-bool importer::isImportedAsStatic(const clang::OverloadedOperatorKind op) {
-  switch (op) {
-#define OVERLOADED_OPERATOR(Name,Spelling,Token,Unary,Binary,MemberOnly) \
-  case clang::OO_##Name: return !MemberOnly;
-#include "clang/Basic/OperatorKinds.def"
-  default:
-    llvm_unreachable("not an operator");
-  }
-}
-
 bool importer::hasSameUnderlyingType(const clang::Type *a,
                                      const clang::TemplateTypeParmDecl *b) {
   while (a->isPointerType() || a->isReferenceType())

lib/ClangImporter/ImporterImpl.h

@@ -1771,10 +1771,6 @@ bool shouldSuppressDeclImport(const clang::Decl *decl);
 /// but are now renamed using the swift_name attribute.
 bool isSpecialUIKitStructZeroProperty(const clang::NamedDecl *decl);
 
-/// \returns true if this operator should be made a static function
-/// even if imported as a non-static member function.
-bool isImportedAsStatic(clang::OverloadedOperatorKind op);
-
 /// \returns true if \p a has the same underlying type as \p b after removing
 /// any pointer/reference specifiers. Note that this does not currently look through
 /// nested types other than pointers or references.