Removed unneccessary check for RUST_TEST_TASKS env var. This varia…

src/lib.rs

@@ -43,16 +43,12 @@ extern crate libc;
 #[cfg(test)]
 mod test {
     use std::env;
-    
+
     #[test]
     pub fn check_rust_unit_testing_is_not_parallel() {
         match env::var_os("RUST_TEST_THREADS") {
             Some(val) => assert!(val.into_string().unwrap() == "1"),
-            None => panic!("RUST_TEST_THREADS and RUST_TEST_TASKS needs to be 1 for the crust unit tests to work"),
-        }
-        match env::var_os("RUST_TEST_TASKS") {
-            Some(val) => assert!(val.into_string().unwrap() == "1"),
-            None => panic!("RUST_TEST_THREADS and RUST_TEST_TASKS needs to be 1 for the crust unit tests to work"),
+            None => panic!("RUST_TEST_THREADS needs to be 1 for the crust unit tests to work"),
         }
     }
 }