chore!(git): Remove insecure git+git support

Deprecated since pip 21.0

See also:
- https://github.com/pypa/pip/blob/22.1.2/NEWS.rst#deprecations-and-removals-16
- pypa/pip@eeeecbe
- pypa/pip#7543

Author: tony

libvcs/projects/git.py

@@ -157,7 +157,7 @@ def convert_pip_url(pip_url: str) -> VCSLocation:
 
 class GitProject(BaseProject):
     bin_name = "git"
-    schemes = ("git", "git+http", "git+https", "git+git", "git+file")
+    schemes = ("git", "git+http", "git+https", "git+file")
     _remotes: GitProjectRemoteDict
 
     def __init__(