Revert "[BOLT] Hash-based function matching" (#96568)

Reverts llvm/llvm-project#95821

bolt/lib/Rewrite/RewriteInstance.cpp

@@ -82,7 +82,6 @@ extern cl::opt<bool> Hugify;
 extern cl::opt<bool> Instrument;
 extern cl::opt<JumpTableSupportLevel> JumpTables;
 extern cl::opt<bool> KeepNops;
-extern cl::opt<bool> MatchProfileWithFunctionHash;
 extern cl::list<std::string> ReorderData;
 extern cl::opt<bolt::ReorderFunctions::ReorderType> ReorderFunctions;
 extern cl::opt<bool> TerminalTrap;
@@ -2983,9 +2982,6 @@ void RewriteInstance::selectFunctionsToProcess() {
     if (mustSkip(Function))
       return false;
 
-    if (opts::MatchProfileWithFunctionHash)
-      return true;
-
     // If the list is not empty, only process functions from the list.
     if (!opts::ForceFunctionNames.empty() || !ForceFunctionsNR.empty()) {
       // Regex check (-funcs and -funcs-file options).