refactor: drop code for old react native versions

we don't need them for new architecture since new architecture is not supported in those versions.

Author: satya164

packages/create-react-native-library/templates/native-common/android/build.gradle

@@ -34,30 +34,13 @@ def getExtOrIntegerDefault(name) {
   return rootProject.ext.has(name) ? rootProject.ext.get(name) : (project.properties["<%- project.name -%>_" + name]).toInteger()
 }
 
-def supportsNamespace() {
-  def parsed = com.android.Version.ANDROID_GRADLE_PLUGIN_VERSION.tokenize('.')
-  def major = parsed[0].toInteger()
-  def minor = parsed[1].toInteger()
-
-  // Namespace support was added in 7.3.0
-  return (major == 7 && minor >= 3) || major >= 8
-}
-
 android {
-  if (supportsNamespace()) {
 <% if (project.moduleConfig === 'nitro-modules') { -%>
-    namespace "com.margelo.nitro.<%- project.package -%>"
+  namespace "com.margelo.nitro.<%- project.package -%>"
 <% } else { -%>
-    namespace "com.<%- project.package -%>"
+  namespace "com.<%- project.package -%>"
 <% } -%>
 
-    sourceSets {
-      main {
-        manifest.srcFile "src/main/AndroidManifestNew.xml"
-      }
-    }
-  }
-
   compileSdkVersion getExtOrIntegerDefault("compileSdkVersion")
 
   defaultConfig {

packages/create-react-native-library/templates/native-common/android/src/main/AndroidManifest.xml

@@ -1,3 +1,2 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          package="com.<%- project.package -%>">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 </manifest>

packages/create-react-native-library/templates/native-common/android/src/main/AndroidManifestNew.xml

@@ -25,11 +25,4 @@ Pod::Spec.new do |s|
   add_nitrogen_files(s)
 <% } -%>
 
-# Use install_modules_dependencies helper to install the dependencies if React Native version >=0.71.0.
-# See https://github.com/facebook/react-native/blob/febf6b7f33fdb4904669f99d795eba4c0f95d7bf/scripts/cocoapods/new_architecture.rb#L79.
-if respond_to?(:install_modules_dependencies, true)
-  install_modules_dependencies(s)
-else
-  s.dependency "React-Core"
-end
-end
+install_modules_dependencies(s)