Revert "bootstrap: pass crt-static for the compiler host as well"

This reverts commit ec2b861.

Author: alexcrichton

src/bootstrap/bin/rustc.rs

@@ -268,15 +268,6 @@ fn main() {
         if let Ok(host_linker) = env::var("RUSTC_HOST_LINKER") {
             cmd.arg(format!("-Clinker={}", host_linker));
         }
-
-        if let Ok(s) = env::var("RUSTC_HOST_CRT_STATIC") {
-            if s == "true" {
-                cmd.arg("-C").arg("target-feature=+crt-static");
-            }
-            if s == "false" {
-                cmd.arg("-C").arg("target-feature=-crt-static");
-            }
-        }
     }
 
     if env::var_os("RUSTC_PARALLEL_QUERIES").is_some() {

src/bootstrap/builder.rs

@@ -698,10 +698,6 @@ impl<'a> Builder<'a> {
             cargo.env("RUSTC_CRT_STATIC", x.to_string());
         }
 
-        if let Some(x) = self.crt_static(compiler.host) {
-            cargo.env("RUSTC_HOST_CRT_STATIC", x.to_string());
-        }
-
         // Enable usage of unstable features
         cargo.env("RUSTC_BOOTSTRAP", "1");
         self.add_rust_test_threads(&mut cargo);