8277535: Remove redundant Stream.distinct()/sorted() steps

Reviewed-by: prappo

Author: Andrey Turbanov

src/java.base/share/classes/jdk/internal/module/ModulePath.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -527,7 +527,6 @@ private ModuleDescriptor deriveModuleDescriptor(JarFile jf)
         Set<String> packages = classFiles.stream()
                 .map(this::toPackageName)
                 .flatMap(Optional::stream)
-                .distinct()
                 .collect(Collectors.toSet());
 
         // all packages are exported and open

src/jdk.jdeps/share/classes/com/sun/tools/jdeps/ModuleDotGraph.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -65,7 +65,6 @@ public ModuleDotGraph(JdepsConfiguration config, boolean apiOnly) {
         this(config,
              config.rootModules().stream()
                    .map(Module::name)
-                   .sorted()
                    .collect(toMap(Function.identity(), mn -> config.resolve(Set.of(mn)))),
              apiOnly);
     }

src/jdk.jlink/share/classes/jdk/tools/jmod/JmodTask.java

@@ -690,7 +690,6 @@ Set<String> findPackages(Path dir) {
                         .filter(path -> isResource(path.toString()))
                         .map(path -> toPackageName(path))
                         .filter(pkg -> pkg.length() > 0)
-                        .distinct()
                         .collect(Collectors.toSet());
             } catch (IOException ioe) {
                 throw new UncheckedIOException(ioe);
@@ -705,7 +704,6 @@ Set<String> findPackages(JarFile jf) {
                      .filter(e -> !e.isDirectory() && isResource(e.getName()))
                      .map(e -> toPackageName(e))
                      .filter(pkg -> pkg.length() > 0)
-                     .distinct()
                      .collect(Collectors.toSet());
         }