debuginfo: Let LLDB tests run in parallel again since our min-support…

…ed version has no problems with that.

src/compiletest/compiletest.rs

@@ -25,7 +25,7 @@ use std::io::fs;
 use std::from_str::FromStr;
 use getopts::{optopt, optflag, reqopt};
 use common::Config;
-use common::{Pretty, DebugInfoGdb, DebugInfoLldb, Codegen};
+use common::{Pretty, DebugInfoGdb, Codegen};
 use util::logv;
 use regex::Regex;
 
@@ -235,16 +235,6 @@ pub fn run_tests(config: &Config) {
         os::setenv("RUST_TEST_TASKS","1");
     }
 
-    match config.mode {
-        DebugInfoLldb => {
-            // Some older versions of LLDB seem to have problems with multiple
-            // instances running in parallel, so only run one test task at a
-            // time.
-            os::setenv("RUST_TEST_TASKS", "1");
-        }
-        _ => { /* proceed */ }
-    }
-
     let opts = test_opts(config);
     let tests = make_tests(config);
     // sadly osx needs some file descriptor limits raised for running tests in