process: remove source-repository-package

we needed this for process-1.6.20.0, but that version has now
been released on Hackage so we can remove the explicit
source-repository-package stanza

Author: sheaf

cabal.project.bootstrap

@@ -5,4 +5,4 @@ import: project-cabal/pkgs/install.config
 tests: False
 benchmarks: False
 
-index-state: hackage.haskell.org 2024-04-22T06:16:57Z
+index-state: hackage.haskell.org 2024-04-29T14:30:15Z

cabal.project.release

@@ -2,4 +2,4 @@ import: project-cabal/pkgs/cabal.config
 import: project-cabal/pkgs/install.config
 import: project-cabal/pkgs/tests.config
 
-index-state: hackage.haskell.org 2024-04-22T06:16:57Z
+index-state: hackage.haskell.org 2024-04-29T14:30:15Z

project-cabal/pkgs/install.config

@@ -2,9 +2,3 @@ packages:
     cabal-install
   , cabal-install-solver
   , hooks-exe
-
-source-repository-package
-  type: git
-  location: https://github.com/sheaf/process
-  tag: a6af24e973249f8992c274feae382a5d341ad02b
-  post-checkout-command: autoreconf -i