[COFF] Remove an outdated/incorrect comment. NFC.

[mstorsjo]

Summary

Making the section writable doesn't affect how windows does base relocs in case a DLL can't be loaded at the intended base address.

This comment dates back to SVN r79346.

[rnk]

Lgtm yep, that fixme is not relevant.

[mstorsjo]

Committed in SVN r348178.

lib/MC/MCObjectFileInfo.cpp

void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) {
   DataSection = Ctx->getCOFFSection(
       ".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
                    COFF::IMAGE_SCN_MEM_WRITE,
       SectionKind::getData());
   ReadOnlySection = Ctx->getCOFFSection(
       ".rdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
       SectionKind::getReadOnly());
 
-  // FIXME: We're emitting LSDA info into a readonly section on COFF, even
-  // though it contains relocatable pointers.  In PIC mode, this is probably a
-  // big runtime hit for C++ apps.  Either the contents of the LSDA need to be
-  // adjusted or this should be a data section.
   if (T.getArch() == Triple::x86_64) {
     // On Windows 64 with SEH, the LSDA is emitted into the .xdata section
     LSDASection = nullptr;
   } else {
     LSDASection = Ctx->getCOFFSection(".gcc_except_table",
                                       COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
                                           COFF::IMAGE_SCN_MEM_READ,
                                       SectionKind::getReadOnly());