build: Drop needless EXTRA_DIST content

Some EXTRA_DIST content is needless since a git archive is used as the
source tarball.

Makefile.am

@@ -1,4 +1,4 @@
-# Copyright (c) 2013-2016 The Bitcoin Core developers
+# Copyright (c) 2013-2020 The Bitcoin Core developers
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -43,16 +43,7 @@ OSX_INSTALLER_ICONS=$(top_srcdir)/src/qt/res/icons/bitcoin.icns
 OSX_PLIST=$(top_builddir)/share/qt/Info.plist #not installed
 OSX_QT_TRANSLATIONS = da,de,es,hu,ru,uk,zh_CN,zh_TW
 
-DIST_DOCS = \
-  README.md \
-  $(wildcard doc/*.md) \
-  $(wildcard doc/release-notes/*.md)
-DIST_CONTRIB = $(top_srcdir)/contrib/bitcoin-cli.bash-completion \
-	       $(top_srcdir)/contrib/bitcoin-tx.bash-completion \
-	       $(top_srcdir)/contrib/bitcoind.bash-completion \
-	       $(top_srcdir)/contrib/debian/copyright \
-	       $(top_srcdir)/contrib/init \
-	       $(top_srcdir)/contrib/install_db4.sh \
+DIST_CONTRIB = \
 	       $(top_srcdir)/contrib/linearize/linearize-data.py \
 	       $(top_srcdir)/contrib/linearize/linearize-hashes.py
 
@@ -246,7 +237,7 @@ endif
 
 dist_noinst_SCRIPTS = autogen.sh
 
-EXTRA_DIST = $(DIST_SHARE) $(DIST_CONTRIB) $(DIST_DOCS) $(WINDOWS_PACKAGING) $(OSX_PACKAGING) $(BIN_CHECKS)
+EXTRA_DIST = $(DIST_SHARE) $(DIST_CONTRIB) $(WINDOWS_PACKAGING) $(OSX_PACKAGING) $(BIN_CHECKS)
 
 EXTRA_DIST += \
     test/functional \

contrib/gitian-descriptors/gitian-linux.yml

@@ -183,7 +183,7 @@ script: |
     rm -rf ${DISTNAME}/lib/pkgconfig
     find ${DISTNAME}/bin -type f -executable -print0 | xargs -0 -n1 -I{} ../contrib/devtools/split-debug.sh {} {} {}.dbg
     find ${DISTNAME}/lib -type f -print0 | xargs -0 -n1 -I{} ../contrib/devtools/split-debug.sh {} {} {}.dbg
-    cp ../README.md ${DISTNAME}/
+    cp ../../README.md ${DISTNAME}/
     find ${DISTNAME} -not -name "*.dbg" | sort | tar --mtime="$REFERENCE_DATETIME" --no-recursion --mode='u+rw,go+r-w,a+X' --owner=0 --group=0 -c -T - | gzip -9n > ${OUTDIR}/${DISTNAME}-${i}.tar.gz
     find ${DISTNAME} -name "*.dbg" | sort | tar --mtime="$REFERENCE_DATETIME" --no-recursion --mode='u+rw,go+r-w,a+X' --owner=0 --group=0 -c -T - | gzip -9n > ${OUTDIR}/${DISTNAME}-${i}-debug.tar.gz
     cd ../../