Remove extra preamble for copyright.

Similar text may be added in the future

blake2.cpp

@@ -1,7 +1,6 @@
 // blake2.cpp - written and placed in the public domain by Jeffrey Walton and Zooko
-//              Wilcox-O'Hearn. Copyright assigned to the Crypto++ project.
-//              Based on Aumasson, Neves, Wilcox-O'Hearn and Winnerlein's reference BLAKE2
-//              implementation at http://github.com/BLAKE2/BLAKE2.
+//              Wilcox-O'Hearn. Based on Aumasson, Neves, Wilcox-O'Hearn and Winnerlein's
+//              reference BLAKE2 implementation at http://github.com/BLAKE2/BLAKE2.
 
 #include "pch.h"
 #include "config.h"

blake2.h

@@ -1,7 +1,6 @@
 // blake2.h - written and placed in the public domain by Jeffrey Walton and Zooko
-//            Wilcox-O'Hearn. Copyright assigned to the Crypto++ project.
-//            Based on Aumasson, Neves, Wilcox-O'Hearn and Winnerlein's reference BLAKE2
-//            implementation at http://github.com/BLAKE2/BLAKE2.
+//            Wilcox-O'Hearn. Based on Aumasson, Neves, Wilcox-O'Hearn and Winnerlein's
+//            reference BLAKE2 implementation at http://github.com/BLAKE2/BLAKE2.
 
 //! \file blake2.h
 //! \brief Classes for BLAKE2b and BLAKE2s message digests and keyed message digests

chacha.cpp

@@ -1,5 +1,4 @@
 // chacha.cpp - written and placed in the public domain by Jeffrey Walton.
-//              Copyright assigned to the Crypto++ project.
 //              Based on Wei Dai's Salsa20 and Bernstein's reference ChaCha
 //              family implementation at http://cr.yp.to/chacha.html.
 

chacha.h

@@ -1,5 +1,4 @@
 // chacha.h - written and placed in the public domain by Jeffrey Walton.
-//            Copyright assigned to the Crypto++ project.
 //            Based on Wei Dai's Salsa20 and Bernstein's reference ChaCha
 //            family implementation at http://cr.yp.to/chacha.html.
 

drbg.h

@@ -1,5 +1,4 @@
 // drbg.h - written and placed in public domain by Jeffrey Walton.
-//          Copyright assigned to Crypto++ project.
 
 //! \file drbg.h
 //! \brief Classes for NIST DRBGs from SP 800-90A

hkdf.h

@@ -1,4 +1,4 @@
-// hkdf.h - written and placed in public domain by Jeffrey Walton. Copyright assigned to Crypto++ project.
+// hkdf.h - written and placed in public domain by Jeffrey Walton.
 
 //! \file hkdf.h
 //! \brief Classes for HKDF from RFC 5869

mersenne.h

@@ -1,5 +1,4 @@
 // mersenne.h - written and placed in public domain by Jeffrey Walton.
-//              Copyright assigned to Crypto++ project.
 
 //! \file mersenne.h
 //! \brief Class file for Mersenne Twister

poly1305.cpp

@@ -1,6 +1,5 @@
 // poly1305.cpp - written and placed in the public domain by Jeffrey Walton and Jean-Pierre Munch
 //                Based on Andy Polyakov's Base-2^26 scalar multiplication implementation for OpenSSL.
-//                Copyright assigned to the Crypto++ project
 
 #include "pch.h"
 #include "cryptlib.h"

poly1305.h

@@ -1,6 +1,5 @@
 // poly1305.h - written and placed in the public domain by Jeffrey Walton and Jean-Pierre Munch
 //              Based on Andy Polyakov's Base-2^26 scalar multiplication implementation for OpenSSL.
-//              Copyright assigned to the Crypto++ project
 
 //! \file poly1305.h
 //! \brief Classes for Poly1305 message authentication code

rdrand.cpp

@@ -1,5 +1,4 @@
 // rdrand.cpp - written and placed in public domain by Jeffrey Walton and Uri Blumenthal.
-//              Copyright assigned to Crypto++ project.
 
 #include "pch.h"
 #include "config.h"

rdrand.h

@@ -1,5 +1,4 @@
 // rdrand.h - written and placed in public domain by Jeffrey Walton and Uri Blumenthal.
-//            Copyright assigned to Crypto++ project.
 
 //! \file rdrand.h
 //! \brief Classes for RDRAND and RDSEED

siphash.h

@@ -1,5 +1,4 @@
 // siphash.h - written and placed in public domain by Jeffrey Walton.
-//             Copyright assigned to Crypto++ project.
 
 //! \file siphash.h
 //! \brief Classes for SipHash message authentication code

trap.h

@@ -1,5 +1,4 @@
 // trap.h - written and placed in public domain by Jeffrey Walton.
-//          Copyright assigned to Crypto++ project
 
 //! \file trap.h
 //! \brief Debugging and diagnostic assertions