[ELF] - Recommit r293749. Improve comment. NFC.

llvm-svn: 293751
diff --git a/lld/ELF/LinkerScript.cpp b/lld/ELF/LinkerScript.cpp
index 22b8ff3..a2e7a52 100644
--- a/lld/ELF/LinkerScript.cpp
+++ b/lld/ELF/LinkerScript.cpp
@@ -1494,8 +1494,7 @@
   while (!Error && !consume("}")) {
     StringRef Tok = next();
     if (Tok == ";") {
-      // Commands may contain excessive additional semicolons around.
-      // We should be able to parse it.
+      // Empty commands are allowed. Do nothing here.
     } else if (SymbolAssignment *Assignment = readProvideOrAssignment(Tok)) {
       Cmd->Commands.emplace_back(Assignment);
     } else if (BytesDataCommand *Data = readBytesDataCommand(Tok)) {