Revert "Use debug version of MSVC runtime library on debug (#1231)" (#…

…1237)

This reverts commit c80a706.

src/lib.rs

@@ -1945,15 +1945,8 @@ impl Build {
  None => {
  let features = self.getenv("CARGO_CFG_TARGET_FEATURE");
  let features = features.as_deref().unwrap_or_default();
- let debug = self.get_debug();
  if features.to_string_lossy().contains("crt-static") {
- if debug {
- "-MTd"
- } else {
- "-MT"
- }
- } else if debug {
- "-MDd"
+ "-MT"
  } else {
  "-MD"
  }