buildRustPackage: remove git from nativeBuildInputs

Having git in nativeBuildInputs causes thousands of rebuilds when git is touched
because every derivation that somehow transiently depends on a rust package will
change. See https://github.com/NixOS/nixpkgs/pull/205682 for instance.

AFAICT git is unused. Only the fetcher needs git which it has already.

Fixes https://github.com/NixOS/nixpkgs/issues/205804

pkgs/build-support/rust/build-rust-package/default.nix

···
 , stdenv
 , callPackage
 , cacert
-, git
 , cargoBuildHook
 , cargoCheckHook
 , cargoInstallHook
···
     })
   ] ++ [
     cacert
-    git
     cargoBuildHook
     (if useNextest then cargoNextestHook else cargoCheckHook)
     cargoInstallHook

pkgs/development/compilers/rust/make-rust-platform.nix

···
   };
 
   buildRustPackage = callPackage ../../../build-support/rust/build-rust-package {
-    git = buildPackages.gitMinimal;
     inherit stdenv cargoBuildHook cargoCheckHook cargoInstallHook cargoNextestHook cargoSetupHook
       fetchCargoTarball importCargoLock rustc;
   };