Remove ArchiveKind::Other

Also unused since introduction in rust-lang#35174

Author: Mark-Simulacrum

src/librustc_codegen_llvm/llvm/ffi.rs

@@ -500,9 +500,6 @@ pub enum DiagnosticLevel {
 #[derive(Copy, Clone)]
 #[repr(C)]
 pub enum ArchiveKind {
-    // FIXME: figure out if this variant is needed at all.
-    #[allow(dead_code)]
-    Other,
     K_GNU,
     K_BSD,
     K_DARWIN,

src/rustllvm/ArchiveWrapper.cpp

@@ -35,7 +35,6 @@ struct RustArchiveIterator {
 };
 
 enum class LLVMRustArchiveKind {
-  Other,
   GNU,
   BSD,
   DARWIN,