Remove workaround for broken cc-rs versions (#235)

The workaround introduced in #39
is no longer necessary since `cc-rs` handles C++ requirements
internally, and is in fact detrimental since `cc-rs` has required the target to be
a `rustc` target triple since rust-lang/cc-rs#1225 /
rust-lang/cc-rs#1252.

Additionally, deprecate `uses_cxx11` which was introduced in the same
PR.

Fixes rust-lang/cc-rs#1276.

I didn't update the dependency to anything specific, just a version that
I know has the fix.

Cargo.toml

@@ -15,4 +15,4 @@ categories = ["development-tools::build-utils"]
 edition = "2021"
 
 [dependencies]
-cc = "1.0.83"
+cc = "1.1.0"

src/lib.rs

@@ -387,6 +387,7 @@ impl Config {
     ///
     /// This does not otherwise affect any CXX flags, i.e. it does not set
     /// -std=c++11 or -stdlib=libc++.
+    #[deprecated = "no longer does anything, C++ is determined based on `cc::Build`, and the macOS issue has been fixed upstream"]
     pub fn uses_cxx11(&mut self) -> &mut Config {
         self.uses_cxx11 = true;
         self
@@ -440,13 +441,7 @@ impl Config {
     pub fn build(&mut self) -> PathBuf {
         let target = match self.target.clone() {
             Some(t) => t,
-            None => {
-                let mut t = getenv_unwrap("TARGET");
-                if t.ends_with("-darwin") && self.uses_cxx11 {
-                    t += "11"
-                }
-                t
-            }
+            None => getenv_unwrap("TARGET"),
         };
         let host = self.host.clone().unwrap_or_else(|| getenv_unwrap("HOST"));