Remove usage of vistir.to_bytes

Remove backward compatability code

pipenv/__init__.py

@@ -43,6 +43,7 @@ if os.name == "nt":
     from pipenv.vendor import colorama
 
     # Backward compatability with vistir
+    # These variables will be removed in vistir 0.8.0
     no_color = False
     for item in ("ANSI_COLORS_DISABLED", "VISTIR_DISABLE_COLORS"):
         if os.getenv(item):

pipenv/core.py

@@ -1468,7 +1468,7 @@ def write_requirement_to_file(
         click.echo(
             f"Writing supplied requirement line to temporary file: {line!r}", err=True
         )
-    f.write(vistir.misc.to_bytes(line))
+    f.write(line)
     r = f.name
     f.close()
     return r
@@ -1661,8 +1661,8 @@ def pip_install_deps(
                 err=True,
             )
         target = editable_requirements if vcs_or_editable else standard_requirements
-        target.write(vistir.misc.to_bytes(line))
-        target.write(vistir.misc.to_bytes("\n"))
+        target.write(line)
+        target.write("\n")
     standard_requirements.close()
     editable_requirements.close()
 

pipenv/environment.py

@@ -1,5 +1,3 @@
-from __future__ import annotations
-
 import contextlib
 import importlib
 import importlib.util