feat(mm): remove MALLOC_MMAP_THRESHOLD_ from launcher

Closes #6007

installer/templates/invoke.sh.in

@@ -23,6 +23,8 @@ cd "$scriptdir"
 . .venv/bin/activate
 
 export INVOKEAI_ROOT="$scriptdir"
+
+# Stash the CLI args - when we prompt for user input, `$@` is overwritten
 PARAMS=$@
 
 # This setting allows torch to fall back to CPU for operations that are not supported by MPS on macOS.
@@ -30,9 +32,6 @@ if [ "$(uname -s)" == "Darwin" ]; then
     export PYTORCH_ENABLE_MPS_FALLBACK=1
 fi
 
-# Avoid glibc memory fragmentation. See invokeai/backend/model_management/README.md for details.
-export MALLOC_MMAP_THRESHOLD_=1048576
-
 # Primary function for the case statement to determine user input
 do_choice() {
     case $1 in