gnu: ghc: Depend on 'git-minimal/fixed'.

* gnu/packages/haskell.scm (ghc-8.8): Replace GIT/FIXED by
GIT-MINIMAL/FIXED.
* gnu/packages/version-control.scm (git/fixed): Remove.

gnu/packages/haskell.scm

@@ -634,8 +634,7 @@ interactive environment for the functional language Haskell.")
            (sha256
             (base32
              "0c55pj2820q26rikhpf636sn4mjgqsxjrl94vsywrh79dxp3k14z"))))
-       ;; TODO: Change to GIT-MINIMAL/FIXED.
-       ("git" ,git/fixed)                         ; invoked during tests
+       ("git" ,git-minimal/fixed)                 ; invoked during tests
        ,@(filter (match-lambda
                    (("ghc-bootstrap" . _) #f)
                    (("ghc-testsuite" . _) #f)

gnu/packages/version-control.scm

@@ -669,32 +669,6 @@ everything from small to very large projects with speed and efficiency.")
                (base32
                 "0bqz401dyp8wnjj3k5ahrniwk4dalndysqazzwdvv25hqbkacm70"))))))
 
-(define-public git/fixed
-  ;; Version that rarely changes, depended on by GHC.
-  ;; TODO: Remove and use 'git-minimal/fixed' instead.
-  (package/inherit git
-    (version "2.33.1")
-    (source (origin
-              (method url-fetch)
-              (uri (string-append "mirror://kernel.org/software/scm/git/git-"
-                                  version ".tar.xz"))
-              (sha256
-               (base32
-                "0bqz401dyp8wnjj3k5ahrniwk4dalndysqazzwdvv25hqbkacm70"))))
-    (properties `((hidden? . #t)
-                  ,@(package-properties git)))
-    (native-inputs
-     (modify-inputs (package-native-inputs git)
-       (replace "git-manpages"
-         (origin
-           (method url-fetch)
-           (uri (string-append
-                 "mirror://kernel.org/software/scm/git/git-manpages-"
-                 version ".tar.xz"))
-           (sha256
-            (base32
-             "11xb0n1ckkm2g7r3sxsknkhsak739xg925zbz3aalv7mr7qijln7"))))))))
-
 (define-public git2cl
   (let ((commit "1d74d4c0d933fc69ed5cec838c73502584dead05"))
     (package