Revert "[MC] output inlined-at debug info (#106230)"

This reverts commit f3dc358953a13caf7521fc615a08f6317930351c.

This causes a large compile-time regression:
https://llvm-compile-time-tracker.com/compare.php?from=267403442264959f6b06e227ff450c385f4b3ef2&to=f3dc358953a13caf7521fc615a08f6317930351c&stat=instructions:u

1 files changed, 2 insertions, 3 deletions

diff --git a/llvm/lib/MC/MCObjectStreamer.cpp b/llvm/lib/MC/MCObjectStreamer.cpp
index 41c0880..9aee1ab 100644
--- a/llvm/lib/MC/MCObjectStreamer.cpp
+++ b/llvm/lib/MC/MCObjectStreamer.cpp
@@ -418,14 +418,13 @@ void MCObjectStreamer::emitDwarfLocDirective(unsigned FileNo, unsigned Line,
                                              unsigned Column, unsigned Flags,
                                              unsigned Isa,
                                              unsigned Discriminator,
-                                             StringRef FileName,
-                                             StringRef Comment) {
+                                             StringRef FileName) {
   // In case we see two .loc directives in a row, make sure the
   // first one gets a line entry.
   MCDwarfLineEntry::make(this, getCurrentSectionOnly());
 
   this->MCStreamer::emitDwarfLocDirective(FileNo, Line, Column, Flags, Isa,
-                                          Discriminator, FileName, Comment);
+                                          Discriminator, FileName);
 }
 
 static const MCExpr *buildSymbolDiff(MCObjectStreamer &OS, const MCSymbol *A,