fix syntax

Signed-off-by: Mihai Maruseac <[email protected]>

Author: mihaimaruseac

build-constraints/lts-24-build-constraints.yaml

@@ -6134,10 +6134,6 @@ packages:
         - persistent-mysql-haskell < 0 # tried persistent-mysql-haskell-0.6.0, but its *library* requires tls >=1.3.5 && < 1.5 and the snapshot contains tls-2.1.8
         - stack < 0 # tried stack-3.7.1, but its *library* requires Cabal >=3.10.3.0 && < 3.12 and the snapshot contains Cabal-3.12.1.0
     # End of Library and exe bounds failures
-
-    "Stackage upper bounds":
-       []
-    # end of Stackage upper bounds
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of