nix: Do not reduce the size of the JDK

This is a remnant of building the docker container using Nix and was
used to reduce the size of the docker container. For our current usage,
this only increases complexity, brittleness and reduces maintainability.

Author: ibbem

default.nix

@@ -93,10 +93,6 @@ pkgs.stdenvNoCC.mkDerivation rec {
   #   build-time and run-time dependencies.
   outputs = ["out" "maven"];
 
-  jre-minimal = pkgs.callPackage (import "${sources.nixpkgs}/pkgs/development/compilers/openjdk/jre.nix") {
-    modules = ["java.base" "java.desktop"];
-  };
-
   buildPhase = ''
     runHook preBuild
 
@@ -136,7 +132,7 @@ pkgs.stdenvNoCC.mkDerivation rec {
     install -Dm644 "target/diffdetective-${version}.jar" "$out/share/java/DiffDetective.jar"
     local jar="$out/share/java/DiffDetective/DiffDetective-jar-with-dependencies.jar"
     install -Dm644 "target/diffdetective-${version}-jar-with-dependencies.jar" "$jar"
-    makeWrapper "${jre-minimal}/bin/java" "$out/bin/DiffDetective" --add-flags "-cp \"$jar\"" \
+    makeWrapper "${pkgs.jdk}/bin/java" "$out/bin/DiffDetective" --add-flags "-cp \"$jar\"" \
       --prefix PATH : "${pkgs.graphviz}/bin"
 
     # install documentation in "$out"