[IR] Remove options to make scalable TypeSize access a warning (#156336)

This removes the `LLVM_ENABLE_STRICT_FIXED_SIZE_VECTORS` cmake option
and the `-treat-scalable-fixed-error-as-warning` opt flag.

We stopped treating these as warnings by default a long time ago
(62f09d788f9fc540db12f3cfa2f98760071fca96), so I don't think it makes
sense to retain these options at this point. Accessing a scalable
TypeSize as fixed should always result in an error.

1 files changed, 0 insertions, 1 deletions

diff --git a/llvm/lib/Support/CommandLine.cpp b/llvm/lib/Support/CommandLine.cpp
index 8491633..be232f5 100644
--- a/llvm/lib/Support/CommandLine.cpp
+++ b/llvm/lib/Support/CommandLine.cpp
@@ -2671,7 +2671,6 @@ static void initCommonOptions() {
   initSignalsOptions();
   initStatisticOptions();
   initTimerOptions();
-  initTypeSizeOptions();
   initWithColorOptions();
   initDebugOptions();
   initRandomSeedOptions();