haskellPackages.idris: Fix build

Can build with default megaparsec now

pkgs/development/haskell-modules/configuration-common.nix

@@ -710,15 +710,9 @@ self: super: {
     '';
   });
 
-  # A simple MonadFail patch would do too, but not doing the tests is easier
-  megaparsec_6_5_0 = dontCheck super.megaparsec_6_5_0;
-
   # The standard libraries are compiled separately
   idris = generateOptparseApplicativeCompletion "idris" (
-    doJailbreak (dontCheck (super.idris.override {
-      # Needed for versions <= 1.3.1 https://github.com/idris-lang/Idris-dev/pull/4610
-      megaparsec = self.megaparsec_6_5_0;
-    }))
+    doJailbreak (dontCheck super.idris)
   );
 
   # https://github.com/bos/math-functions/issues/25

pkgs/development/haskell-modules/configuration-hackage2nix.yaml

@@ -2503,7 +2503,6 @@ extra-packages:
   - inline-c-cpp < 0.2                  # required on GHC 8.0.x
   - lens-labels == 0.1.*                # required for proto-lens-descriptors
   - mainland-pretty == 0.6.2.*          # required for tensorflow-opgen-0.1.0.0
-  - megaparsec < 7.0                    # required for idris <= 1.3.1: https://github.com/idris-lang/Idris-dev/pull/4610
   - mtl < 2.2                           # newer versions require transformers > 0.4.x, which we cannot provide in GHC 7.8.x
   - mtl-prelude < 2                     # required for to build postgrest on mtl 2.1.x platforms
   - network == 2.6.3.1                  # newer versions don't compile with GHC 7.4.x and below
@@ -6368,7 +6367,6 @@ broken-packages:
   - identifiers
   - idiii
   - idna2008
-  - idris
   - IDynamic
   - ieee-utils
   - iexcloud