Swift: Remove AbstractTypeParamDecl mangling.

AbstractTypeParamDecl itself was removed in swiftlang/swift@36b3f0e.

Author: sashabu

swift/extractor/mangler/SwiftMangler.cpp

@@ -137,13 +137,8 @@ void SwiftMangler::indexExtensions(llvm::ArrayRef<swift::Decl*> siblings) {
   }
 }
 
-SwiftMangledName SwiftMangler::visitAbstractTypeParamDecl(
-    const swift::AbstractTypeParamDecl* decl) {
-  return visitValueDecl(decl, /* force */ true);
-}
-
 SwiftMangledName SwiftMangler::visitGenericTypeParamDecl(const swift::GenericTypeParamDecl* decl) {
-  return visitAbstractTypeParamDecl(decl) << '_' << decl->getDepth() << '_' << decl->getIndex();
+  return visitValueDecl(decl, /*force=*/true) << '_' << decl->getDepth() << '_' << decl->getIndex();
 }
 
 SwiftMangledName SwiftMangler::visitModuleType(const swift::ModuleType* type) {

swift/extractor/mangler/SwiftMangler.h

@@ -60,7 +60,6 @@ class SwiftMangler : private swift::TypeVisitor<SwiftMangler, SwiftMangledName>,
   SwiftMangledName visitAbstractFunctionDecl(const swift::AbstractFunctionDecl* decl);
   SwiftMangledName visitSubscriptDecl(const swift::SubscriptDecl* decl);
   SwiftMangledName visitVarDecl(const swift::VarDecl* decl);
-  SwiftMangledName visitAbstractTypeParamDecl(const swift::AbstractTypeParamDecl* decl);
   SwiftMangledName visitGenericTypeParamDecl(const swift::GenericTypeParamDecl* decl);
 
   // default fallback for non mangled types. This covers types that should not appear in normal