[LLD][ELF] - Remove UnresolvedPolicy::IgnoreAll and relative code. NFC.

The code involved was simply dead. `IgnoreAll` value is used in
`maybeReportUndefined` only which is never called for -r.
And at the same time `IgnoreAll` was set only for -r.

llvm-svn: 339672

lld/ELF/Config.h

@@ -47,7 +47,7 @@ enum class ICFLevel { None, Safe, All };
 enum class StripPolicy { None, All, Debug };
 
 // For --unresolved-symbols.
-enum class UnresolvedPolicy { ReportError, Warn, Ignore, IgnoreAll };
+enum class UnresolvedPolicy { ReportError, Warn, Ignore };
 
 // For --orphan-handling.
 enum class OrphanHandlingPolicy { Place, Warn, Error };

lld/ELF/Driver.cpp

@@ -450,9 +450,6 @@ static std::string getRpath(opt::InputArgList &Args) {
 // Determines what we should do if there are remaining unresolved
 // symbols after the name resolution.
 static UnresolvedPolicy getUnresolvedSymbolPolicy(opt::InputArgList &Args) {
-  if (Args.hasArg(OPT_relocatable))
-    return UnresolvedPolicy::IgnoreAll;
-
   UnresolvedPolicy ErrorOrWarn = Args.hasFlag(OPT_error_unresolved_symbols,
                                               OPT_warn_unresolved_symbols, true)
                                      ? UnresolvedPolicy::ReportError

lld/ELF/Relocations.cpp

@@ -622,9 +622,6 @@ static int64_t computeAddend(const RelTy &Rel, const RelTy *End,
 // Returns true if this function printed out an error message.
 static bool maybeReportUndefined(Symbol &Sym, InputSectionBase &Sec,
                                  uint64_t Offset) {
-  if (Config->UnresolvedSymbols == UnresolvedPolicy::IgnoreAll)
-    return false;
-
   if (Sym.isLocal() || !Sym.isUndefined() || Sym.isWeak())
     return false;