Remove 'Search ' in title for filtered columns in Active Admin

active_admin_filter_form_builder.rb

# lib/active_admin_filter_form_builder.rb

class ActiveAdmin::FilterFormBuilder
  
  protected

  def filter_string_input(method, options = {})
    field_name = "#{method}_contains"

    [ label(field_name, "#{method.to_s.titlecase}"),
      text_field(field_name)
    ].join("\n").html_safe
  end
end

application_controller.rb

# app/controllers/application_controller.rb

class ApplicationController < ActionController::Base
  protect_from_forgery
  
  # Remove 'Search ' in title for filtered columns in Active Admin
  require 'active_admin_filter_form_builder.rb'
end