Don't include built assets in the source tarball.

It looks like code to build and include Javascript bundles was added when React
was first included in the project. This shouldn't be the case - the source tarball
should contain only the source code.

pkg/src/build.sh

@@ -69,18 +69,6 @@ do
     tar cf - "${FILE}" | (cd "src-build/${TARBALL_NAME}"; tar xf -)
 done
 
-pushd web > /dev/null || exit
-    yarn install
-    yarn run bundle
-
-    for FILE in pgadmin/static/js/generated/*
-    do
-        echo Adding "${FILE}"
-        # shellcheck disable=SC2164
-        tar cf - "${FILE}" | (cd "../src-build/${TARBALL_NAME}/web"; tar xf -)
-    done
-popd > /dev/null || exit
-
 # Create the tarball
 echo Creating tarball...
 cd src-build || exit