fix: iOS CocoaPods

ios/RNBackgroundDownload.podspec

@@ -1,24 +0,0 @@
-
-Pod::Spec.new do |s|
-  s.name         = "RNBackgroundDownload"
-  s.version      = "1.0.0"
-  s.summary      = "RNBackgroundDownload"
-  s.description  = <<-DESC
-                  RNBackgroundDownload
-                   DESC
-  s.homepage     = ""
-  s.license      = "MIT"
-  # s.license      = { :type => "MIT", :file => "FILE_LICENSE" }
-  s.author             = { "author" => "author@domain.cn" }
-  s.platform     = :ios, "7.0"
-  s.source       = { :git => "https://github.com/author/RNBackgroundDownload.git", :tag => "master" }
-  s.source_files  = "RNBackgroundDownload/**/*.{h,m}"
-  s.requires_arc = true
-
-
-  s.dependency "React"
-  #s.dependency "others"
-
-end
-
-