pub unsafe fn qunsetenv(var_name: *const c_char) -> bool
This function deletes the variable varName from the environment.
Calls C++ function: bool qunsetenv(const char* varName).
bool qunsetenv(const char* varName)
C++ documentation:
Returns true on success.
true
This function was introduced in Qt 5.1.
See also qputenv() and qgetenv().