revert unchanged jit_frame_slot_offset comment hunk

Author: XrXr

zjit/src/codegen.rs

@@ -3259,9 +3259,8 @@ pub(crate) fn block_iseq_may_throw(iseq: IseqPtr) -> bool {
 /// Byte offset from NATIVE_BASE_PTR of the JITFrame storage slot for a frame at
 /// the given inlining depth. Depth 0 (the top-level frame) lives at
 /// `[NATIVE_BASE_PTR - 8]`; each deeper inlined frame gets the next slot below.
-/// gen_function() reserves `inlining_depth() + 1` of these, so every live
-/// frame's depth maps to a distinct slot, followed by the single saved-SP slot
-/// of base_ptr_slot_offset().
+/// gen_function() reserves `inlining_depth() + 1` slots, so every live frame's
+/// depth maps to a distinct slot inside that reserved region.
 fn jit_frame_slot_offset(depth: InlineDepth) -> i32 {
     -(SIZEOF_VALUE_I32 * (depth as i32 + 1))
 }