rustc: don't install uninstall.sh

pkgs/development/compilers/rust/rustc.nix

@@ -159,6 +159,9 @@ in stdenv.mkDerivation rec {
     # remove references to llvm-config in lib/rustlib/x86_64-unknown-linux-gnu/codegen-backends/librustc_codegen_llvm-llvm.so
     # and thus a transitive dependency on ncurses
     find $out/lib -name "*.so" -type f -exec remove-references-to -t ${llvmShared} '{}' '+'
+
+    # remove uninstall script that doesn't really make sense for Nix.
+    rm $out/lib/rustlib/uninstall.sh
   '';
 
   configurePlatforms = [];