It was supposed to be a giant concrete supporting wall that sliced through part of Manhattan’s West Side. On one side would be the High Line, a popular park. On the other would be a public portion of Hudson Yards, the largest mixed-use private real estate venture in American history.

When news emerged last week that the developer building Hudson Yards was considering the wall, the backlash was intense. “This is the worst sort of planning,” said Gale Brewer, the Manhattan borough president. The City Council speaker, Corey Johnson, said building the wall would break a deal that the developer negotiated years ago to provide accessible and open space to everyone.

On Wednesday, the developer, Related Companies, announced it was backing off.

“It never was in the cards,” said Andrew Rosen, a senior vice president at Related, which is developing Hudson Yards with Oxford Properties. “We were not going to build a wall by the High Line.”