AST: Remove unused EnumDecl::getElement() method

Author: slavapestov

include/swift/AST/Decl.h

@@ -3541,8 +3541,6 @@ class EnumDecl final : public NominalTypeDecl {
     return SourceRange(EnumLoc, getBraces().End);
   }
 
-  EnumElementDecl *getElement(Identifier Name) const;
-  
 public:
   /// A range for iterating the elements of an enum.
   using ElementRange = DowncastFilterRange<EnumElementDecl, DeclRange>;

lib/AST/Decl.cpp

@@ -4182,14 +4182,6 @@ EnumCaseDecl *EnumCaseDecl::create(SourceLoc CaseLoc,
   return ::new (buf) EnumCaseDecl(CaseLoc, Elements, DC);
 }
 
-EnumElementDecl *EnumDecl::getElement(Identifier Name) const {
-  // FIXME: Linear search is not great for large enum decls.
-  for (EnumElementDecl *Elt : getAllElements())
-    if (Elt->getName() == Name)
-      return Elt;
-  return nullptr;
-}
-
 bool EnumDecl::hasPotentiallyUnavailableCaseValue() const {
   switch (static_cast<AssociatedValueCheck>(Bits.EnumDecl.HasAssociatedValues)) {
     case AssociatedValueCheck::Unchecked: