remove outdated FIXMEs on bootstrap

Signed-off-by: ozkanonur <work@onurozkan.dev>

Author: onur-ozkan

src/bootstrap/bootstrap.py

@@ -914,12 +914,7 @@ def build_bootstrap_cmd(self, env):
 
         # preserve existing RUSTFLAGS
         env.setdefault("RUSTFLAGS", "")
-        # we need to explicitly add +xgot here so that we can successfully bootstrap
-        # a usable stage1 compiler
-        # FIXME: remove this if condition on the next bootstrap bump
-        # cfg(bootstrap)
-        if self.build_triple().startswith('mips'):
-            env["RUSTFLAGS"] += " -Ctarget-feature=+xgot"
+
         target_features = []
         if self.get_toml("crt-static", build_section) == "true":
             target_features += ["+crt-static"]

src/bootstrap/compile.rs

@@ -228,13 +228,6 @@ fn copy_third_party_objects(
 ) -> Vec<(PathBuf, DependencyType)> {
     let mut target_deps = vec![];
 
-    // FIXME: remove this in 2021
-    if target == "x86_64-fortanix-unknown-sgx" {
-        if env::var_os("X86_FORTANIX_SGX_LIBS").is_some() {
-            builder.info("Warning: X86_FORTANIX_SGX_LIBS environment variable is ignored, libunwind is now compiled as part of rustbuild");
-        }
-    }
-
     if builder.config.sanitizers_enabled(target) && compiler.stage != 0 {
         // The sanitizers are only copied in stage1 or above,
         // to avoid creating dependency on LLVM.