Remove autofix_submodules call from bindgen

Previously if you checked out a different rev of imgui submodule, this would be clobbered

With this change, you can checkout any revision of imgui, run bindgen, build, test, then commit change to the submodule

The autofix is still available via 'cargo task modfix'

xtask/src/bindgen.rs

@@ -4,7 +4,6 @@ use std::path::{Path, PathBuf};
 
 impl Bindgen {
     pub fn run(self) -> Result<()> {
-        crate::autofix_submodules();
         let root = crate::project_root();
         let bindings = self
             .cimgui_path