build: remove WINDOWS_BITS from build system

We no longer build/ship 32 bit windows executables.

Makefile.am

@@ -25,7 +25,7 @@ BITCOIN_QT_BIN=$(top_builddir)/src/qt/$(BITCOIN_GUI_NAME)$(EXEEXT)
 BITCOIN_CLI_BIN=$(top_builddir)/src/$(BITCOIN_CLI_NAME)$(EXEEXT)
 BITCOIN_TX_BIN=$(top_builddir)/src/$(BITCOIN_TX_NAME)$(EXEEXT)
 BITCOIN_WALLET_BIN=$(top_builddir)/src/$(BITCOIN_WALLET_TOOL_NAME)$(EXEEXT)
-BITCOIN_WIN_INSTALLER=$(PACKAGE)-$(PACKAGE_VERSION)-win$(WINDOWS_BITS)-setup$(EXEEXT)
+BITCOIN_WIN_INSTALLER=$(PACKAGE)-$(PACKAGE_VERSION)-win64-setup$(EXEEXT)
 
 empty :=
 space := $(empty) $(empty)

configure.ac

@@ -525,12 +525,6 @@ case $host in
      if test "x$CXXFLAGS_overridden" = "xno"; then
        CXXFLAGS="$CXXFLAGS -w"
      fi
-     case $host in
-       i?86-*) WINDOWS_BITS=32 ;;
-       x86_64-*) WINDOWS_BITS=64 ;;
-       *) AC_MSG_ERROR("Could not determine win32/win64 for installer") ;;
-     esac
-     AC_SUBST(WINDOWS_BITS)
 
      dnl libtool insists upon adding -nostdlib and a list of objects/libs to link against.
      dnl That breaks our ability to build dll's with static libgcc/libstdc++/libssp. Override

share/setup.nsi.in

@@ -1,4 +1,4 @@
-Name "@PACKAGE_NAME@ (@WINDOWS_BITS@-bit)"
+Name "@PACKAGE_NAME@ (64-bit)"
 
 RequestExecutionLevel highest
 SetCompressor /SOLID lzma
@@ -28,9 +28,7 @@ SetCompressor /SOLID lzma
 # Included files
 !include Sections.nsh
 !include MUI2.nsh
-!if "@WINDOWS_BITS@" == "64"
 !include x64.nsh
-!endif
 
 # Variables
 Var StartMenuGroup
@@ -48,12 +46,8 @@ Var StartMenuGroup
 !insertmacro MUI_LANGUAGE English
 
 # Installer attributes
-OutFile @abs_top_srcdir@/@PACKAGE_TARNAME@-@PACKAGE_VERSION@-win@WINDOWS_BITS@-setup-unsigned.exe
-!if "@WINDOWS_BITS@" == "64"
+OutFile @abs_top_srcdir@/@PACKAGE_TARNAME@-@PACKAGE_VERSION@-win64-setup-unsigned.exe
 InstallDir $PROGRAMFILES64\Bitcoin
-!else
-InstallDir $PROGRAMFILES\Bitcoin
-!endif
 CRCCheck on
 XPStyle on
 BrandingText " "
@@ -94,7 +88,7 @@ Section -post SEC0001
     !insertmacro MUI_STARTMENU_WRITE_BEGIN Application
     CreateDirectory $SMPROGRAMS\$StartMenuGroup
     CreateShortcut "$SMPROGRAMS\$StartMenuGroup\$(^Name).lnk" $INSTDIR\@BITCOIN_GUI_NAME@@EXEEXT@
-    CreateShortcut "$SMPROGRAMS\$StartMenuGroup\@PACKAGE_NAME@ (testnet, @WINDOWS_BITS@-bit).lnk" "$INSTDIR\@BITCOIN_GUI_NAME@@EXEEXT@" "-testnet" "$INSTDIR\@BITCOIN_GUI_NAME@@EXEEXT@" 1
+    CreateShortcut "$SMPROGRAMS\$StartMenuGroup\@PACKAGE_NAME@ (testnet, 64-bit).lnk" "$INSTDIR\@BITCOIN_GUI_NAME@@EXEEXT@" "-testnet" "$INSTDIR\@BITCOIN_GUI_NAME@@EXEEXT@" 1
     CreateShortcut "$SMPROGRAMS\$StartMenuGroup\Uninstall $(^Name).lnk" $INSTDIR\uninstall.exe
     !insertmacro MUI_STARTMENU_WRITE_END
     WriteRegStr HKCU "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\$(^Name)" DisplayName "$(^Name)"
@@ -138,7 +132,7 @@ Section -un.post UNSEC0001
     DeleteRegKey HKCU "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\$(^Name)"
     Delete /REBOOTOK "$SMPROGRAMS\$StartMenuGroup\Uninstall $(^Name).lnk"
     Delete /REBOOTOK "$SMPROGRAMS\$StartMenuGroup\$(^Name).lnk"
-    Delete /REBOOTOK "$SMPROGRAMS\$StartMenuGroup\@PACKAGE_NAME@ (testnet, @WINDOWS_BITS@-bit).lnk"
+    Delete /REBOOTOK "$SMPROGRAMS\$StartMenuGroup\@PACKAGE_NAME@ (testnet, 64-bit).lnk"
     Delete /REBOOTOK "$SMSTARTUP\Bitcoin.lnk"
     Delete /REBOOTOK $INSTDIR\uninstall.exe
     Delete /REBOOTOK $INSTDIR\debug.log
@@ -160,7 +154,6 @@ SectionEnd
 # Installer functions
 Function .onInit
     InitPluginsDir
-!if "@WINDOWS_BITS@" == "64"
     ${If} ${RunningX64}
       ; disable registry redirection (enable access to 64-bit portion of registry)
       SetRegView 64
@@ -168,7 +161,6 @@ Function .onInit
       MessageBox MB_OK|MB_ICONSTOP "Cannot install 64-bit version on a 32-bit system."
       Abort
     ${EndIf}
-!endif
 FunctionEnd
 
 # Uninstaller functions