[NFC] Fix the use of "strict" in subtypes.h (#5804)

Previously we incorrectly used "strict" to mean the immediate subtypes of a
type, when in fact a strict subtype of a type is any subtype excluding the type
itself. Rename the incorrect `getStrictSubTypes` to `getImmediateSubTypes`,
rename the redundant `getAllStrictSubTypes` to `getStrictSubTypes`, and rename
the redundant `getAllSubTypes` to `getSubTypes`. Fixing the capitalization of
"SubType" to "Subtype" is left as future work.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/wasm/wasm-binary.cpp b/src/wasm/wasm-binary.cpp
index 4d51e0f43..d9b7e1a84 100644
--- a/src/wasm/wasm-binary.cpp
+++ b/src/wasm/wasm-binary.cpp
@@ -226,8 +226,7 @@ void WasmBinaryWriter::writeTypes() {
     return;
   }
   // Count the number of recursion groups, which is the number of elements in
-  // the type section. With nominal typing there is always one group and with
-  // equirecursive typing there is one group per type.
+  // the type section.
   size_t numGroups = 0;
   {
     std::optional<RecGroup> lastGroup;