GC: Remove duplicated copyright, update years and holders

Author: Geod24

src/core/internal/gc/bits.d

@@ -1,16 +1,10 @@
 /**
  * Contains a bitfield used by the GC.
  *
- * Copyright: Copyright Digital Mars 2005 - 2013.
+ * Copyright: D Language Foundation 2005 - 2021.
  * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
  * Authors:   Walter Bright, David Friedman, Sean Kelly
  */
-
-/*          Copyright Digital Mars 2005 - 2013.
- * Distributed under the Boost Software License, Version 1.0.
- *    (See accompanying file LICENSE or copy at
- *          http://www.boost.org/LICENSE_1_0.txt)
- */
 module core.internal.gc.bits;
 
 

src/core/internal/gc/impl/conservative/gc.d

@@ -1,16 +1,10 @@
 /**
  * Contains the garbage collector implementation.
  *
- * Copyright: Copyright Digital Mars 2001 - 2016.
+ * Copyright: D Language Foundation 2001 - 2021.
  * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
  * Authors:   Walter Bright, David Friedman, Sean Kelly
  */
-
-/*          Copyright Digital Mars 2005 - 2016.
- * Distributed under the Boost Software License, Version 1.0.
- *    (See accompanying file LICENSE or copy at
- *          http://www.boost.org/LICENSE_1_0.txt)
- */
 module core.internal.gc.impl.conservative.gc;
 
 // D Programming Language Garbage Collector implementation

src/core/internal/gc/impl/manual/gc.d

@@ -17,12 +17,6 @@
  * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
  * Authors:   Sean Kelly
  */
-
-/*          Copyright Sean Kelly 2005 - 2016.
- * Distributed under the Boost Software License, Version 1.0.
- *    (See accompanying file LICENSE or copy at
- *          http://www.boost.org/LICENSE_1_0.txt)
- */
 module core.internal.gc.impl.manual.gc;
 
 import core.gc.gcinterface;

src/core/internal/gc/os.d

@@ -1,16 +1,10 @@
 /**
  * Contains OS-level routines needed by the garbage collector.
  *
- * Copyright: Copyright Digital Mars 2005 - 2013.
+ * Copyright: D Language Foundation 2005 - 2021.
  * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
  * Authors:   Walter Bright, David Friedman, Sean Kelly, Leandro Lucarella
  */
-
-/*          Copyright Digital Mars 2005 - 2013.
- * Distributed under the Boost Software License, Version 1.0.
- *    (See accompanying file LICENSE or copy at
- *          http://www.boost.org/LICENSE_1_0.txt)
- */
 module core.internal.gc.os;
 
 

src/core/internal/gc/pooltable.d

@@ -1,7 +1,7 @@
 /**
  * A sorted array to quickly lookup pools.
  *
- * Copyright: Copyright Digital Mars 2001 -.
+ * Copyright: D Language Foundation 2001 - 2021
  * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
  * Authors:   Walter Bright, David Friedman, Sean Kelly, Martin Nowak
  */

src/core/internal/gc/proxy.d

@@ -1,16 +1,10 @@
 /**
  * Contains the external GC interface.
  *
- * Copyright: Copyright Digital Mars 2005 - 2016.
+ * Copyright: D Language Foundation 2005 - 2021.
  * License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
  * Authors:   Walter Bright, Sean Kelly
  */
-
-/*          Copyright Digital Mars 2005 - 2016.
- * Distributed under the Boost Software License, Version 1.0.
- *    (See accompanying file LICENSE or copy at
- *          http://www.boost.org/LICENSE_1_0.txt)
- */
 module core.internal.gc.proxy;
 
 import core.internal.gc.impl.proto.gc;