doc: Drop mentions of share/genbuild.sh

cmake/script/GenerateBuildInfo.cmake

@@ -2,8 +2,6 @@
 # Distributed under the MIT software license, see the accompanying
 # file COPYING or https://opensource.org/license/mit/.
 
-# This script is a multiplatform port of the share/genbuild.sh shell script.
-
 macro(fatal_error)
   message(FATAL_ERROR "\n"
     "Usage:\n"

src/clientversion.cpp

@@ -25,7 +25,7 @@ const std::string CLIENT_NAME("Satoshi");
 
 #ifdef HAVE_BUILD_INFO
 #include <obj/build.h>
-// The <obj/build.h>, which is generated by the build environment (share/genbuild.sh),
+// The <obj/build.h>, which is generated by the build environment (cmake/script/GenerateBuildInfo.cmake),
 // could contain only one line of the following:
 //   - "#define BUILD_GIT_TAG ...", if the top commit is tagged
 //   - "#define BUILD_GIT_COMMIT ...", if the top commit is not tagged