Stop progress_cb from generating spurious warnings (#243)

`progress_cb` is used to give progress updates on pushes and pulls. There is
no reason for it to pollute the logs by logging its updates as warnings.
Changed these to plain print statements.

godot-git-plugin/src/git_callbacks.cpp

@@ -10,11 +10,7 @@
 extern "C" int progress_cb(const char *str, int len, void *data) {
  (void)data;
 
- char *progress_str = new char[len + 1];
- std::memcpy(progress_str, str, len);
- progress_str[len] = '\0';
- godot::UtilityFunctions::push_warning("remote: ", godot::String::utf8(progress_str).strip_edges());
- delete[] progress_str;
+ godot::UtilityFunctions::print("remote: ", godot::String::utf8(str, len).strip_edges());
 
  return 0;
 }
@@ -63,7 +59,7 @@ extern "C" int push_transfer_progress_cb(unsigned int current, unsigned int tota
  progress = (current * 100) / total;
  }
 
- godot::UtilityFunctions::print("Writing Objects: ", uint32_t(progress), "% (", uint32_t(current), "/", uint32_t(total), ", ", uint32_t(bytes), " bytes done.");
+ godot::UtilityFunctions::print("Writing Objects: ", uint32_t(progress), "% (", uint32_t(current), "/", uint32_t(total), ", ", uint32_t(bytes), " bytes done.)");
  return 0;
 }